diff --git a/docs/static/fonts/icons/iconfont.css b/docs/static/fonts/icons/iconfont.css
index 6ba0be84..4d0488f8 100644
--- a/docs/static/fonts/icons/iconfont.css
+++ b/docs/static/fonts/icons/iconfont.css
@@ -1,8 +1,8 @@
 @font-face {
 	font-family: "iconfont";
-	src: url("iconfont.eot?85962023e1141ed4156344d036c50fe8?#iefix") format("embedded-opentype"),
-url("iconfont.woff2?85962023e1141ed4156344d036c50fe8") format("woff2"),
-url("iconfont.woff?85962023e1141ed4156344d036c50fe8") format("woff");
+	src: url("iconfont.eot?8d461ad14fbdc5b48a8749a696d345dd?#iefix") format("embedded-opentype"),
+url("iconfont.woff2?8d461ad14fbdc5b48a8749a696d345dd") format("woff2"),
+url("iconfont.woff?8d461ad14fbdc5b48a8749a696d345dd") format("woff");
 }
 
 .icon {
diff --git a/docs/static/fonts/icons/iconfont.eot b/docs/static/fonts/icons/iconfont.eot
index 9a182952..5213c0ee 100644
Binary files a/docs/static/fonts/icons/iconfont.eot and b/docs/static/fonts/icons/iconfont.eot differ
diff --git a/docs/static/fonts/icons/iconfont.svg b/docs/static/fonts/icons/iconfont.svg
index 647ad0a8..f6fd85f3 100644
--- a/docs/static/fonts/icons/iconfont.svg
+++ b/docs/static/fonts/icons/iconfont.svg
@@ -21,7 +21,7 @@
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@@ -51,13 +51,13 @@
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diff --git a/docs/static/fonts/icons/iconfont.ttf b/docs/static/fonts/icons/iconfont.ttf
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diff --git a/docs/static/fonts/icons/iconfont.woff b/docs/static/fonts/icons/iconfont.woff
index 82bd444b..c055ec95 100644
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diff --git a/docs/static/fonts/icons/iconfont.woff2 b/docs/static/fonts/icons/iconfont.woff2
index 7401e50c..ba22a5b8 100644
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diff --git a/svgicons/categories/addpackage.svg b/svgicons/categories/addpackage.svg
index 20d6e3e2..4c790989 100644
--- a/svgicons/categories/addpackage.svg
+++ b/svgicons/categories/addpackage.svg
@@ -9,15 +9,7 @@
 <title>color</title>
 <g id="menu_icn_expansions" transform="translate(-9596 11554)">
 	<circle id="Ellipse_34" class="st0" cx="9607.5" cy="-11542" r="9"/>
-	<g id="Rectangle_253_1_" transform="translate(527 574)">
-		<rect x="9079.5" y="-12122" class="st0" width="2" height="12"/>
-		<rect x="9080" y="-12121.5" class="st1" width="1" height="11"/>
-	</g>
-	<g id="Rectangle_254_1_" transform="translate(522 581) rotate(-90)">
-		
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-		
-			<rect x="12117.5" y="9085" transform="matrix(-2.535182e-06 -1 1 -2.535182e-06 3037.5305 21208.5234)" class="st1" width="11" height="1"/>
-	</g>
+	<polygon class="st1" points="9613.5,-11543 9608.5,-11543 9608.5,-11548 9606.5,-11548 9606.5,-11543 9601.5,-11543 9601.5,-11541 
+		9606.5,-11541 9606.5,-11536 9608.5,-11536 9608.5,-11541 9613.5,-11541 	"/>
 </g>
 </svg>
diff --git a/svgicons/categories/functions.svg b/svgicons/categories/functions.svg
index cb203a8d..734e230e 100644
--- a/svgicons/categories/functions.svg
+++ b/svgicons/categories/functions.svg
@@ -7,25 +7,24 @@
 </style>
 <title>color</title>
 <g id="menu_icn_FX" transform="translate(-9079.886 11883.081)">
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-		c0.3-0.5,0.6-1,0.7-1.5c0.8-2.8,1.6-5.6,2.4-8.4C9087.2-11874.4,9087.2-11874.4,9087.2-11874.5z"/>
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-		C9097.5-11866.9,9097.6-11867.2,9097.9-11867.4z"/>
+	<path id="Path_166" class="st0" d="M9086.9-11874.7h-1.8c0-0.5,0-0.6,0.5-0.6c0.9,0,1.5-0.4,1.8-1.2c0.4-0.9,1-1.7,1.5-2.6
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+		c0-0.1,0-0.1,0-0.2c0-0.2,0.1-0.4,0.1-0.6c-0.2,0-0.5-0.1-0.7,0c-0.4,0.2-0.7,0.4-1,0.9c-0.4,0.6-0.7,1.4-1,2.1
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+		c0.8-3,1.7-6,2.6-8.9C9086.9-11874.6,9086.9-11874.6,9086.9-11874.7z"/>
+	<path id="Path_167" class="st0" d="M9098.6-11862.8c0.1-0.1,0.1-0.2,0.2-0.3c1.1-0.6,1.8-1.8,2-3c0.4-2,0.4-4-0.1-6
+		c-0.3-1.1-1-1.9-1.8-2.6c-0.1-0.1-0.2-0.2-0.2-0.3c1.9,0.7,3.7,3.1,3.7,6.1C9102.5-11866.3,9101-11863.8,9098.6-11862.8z"/>
+	<path id="Path_168" class="st0" d="M9093.6-11874.9c0,0.1-0.1,0.2-0.1,0.2c-1.1,0.6-1.8,1.8-2,3c-0.4,2-0.4,4,0.1,6.1
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+	<path id="Path_169" class="st0" d="M9098.3-11867.1c0,0,0.1,0,0.2,0.1c0,0,0,0,0,0.1c-0.3,0.5-0.6,1-1.2,1.3c-0.2,0.2-0.6,0.3-1,0
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+		c-0.2,0.2-0.4,0.4-0.7,0.5c-0.3,0.1-0.6,0-0.9-0.3v-0.1c0-0.2,0-0.4,0.2-0.5c0.1-0.1,0.3-0.1,0.5,0l0.1,0.1
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+		c0.1-0.2,0.3-0.5,0.5-0.7c0.3-0.3,0.6-0.7,1-1c0.2-0.1,0.4-0.2,0.6-0.2c0.3,0,0.5,0.2,0.5,0.5v0.1c-0.1,0.3-0.3,0.4-0.6,0.3l0,0
+		c-0.1,0-0.1,0-0.2,0c-0.3-0.2-0.7-0.1-1,0.2l0,0c-0.2,0.3-0.5,0.7-0.7,1.1c0,0.1,0,0.1,0,0.2c0.2,0.7,0.3,1.5,0.5,2.3
+		c0,0.1,0,0.1,0.1,0.2c0.1,0.3,0.3,0.4,0.5,0.1C9097.9-11866.6,9098-11866.9,9098.3-11867.1z"/>
 </g>
 </svg>
diff --git a/svgicons/categories/loops.svg b/svgicons/categories/loops.svg
index 24816050..bb84f3f5 100644
--- a/svgicons/categories/loops.svg
+++ b/svgicons/categories/loops.svg
@@ -7,10 +7,11 @@
 </style>
 <title>color</title>
 <g id="menu_icn_loops" transform="translate(-9080.903 10401.478)">
-	<path id="Path_141" class="st0" d="M9085.3-10385.5c-0.9-1.3-1.9-2.5-2.8-3.8h1.9c0-2.2,0.9-4.4,2.5-5.9c1.1-1.1,2.4-1.8,3.9-2.1
-		c2.7-0.6,5.6,0.2,7.6,2.2c-0.5,0.5-0.9,0.9-1.3,1.3c-2.4-2-4.9-2.4-7.7-0.9c-2,1.1-3.1,3.2-3.1,5.4h1.9
-		C9087.2-10388,9086.2-10386.7,9085.3-10385.5z"/>
-	<path id="Path_142" class="st0" d="M9098.9-10389.3h-1.9c1-1.3,1.9-2.5,2.8-3.8c1,1.3,1.9,2.5,2.8,3.8h-1.9c0,2.3-1,4.5-2.6,6
-		c-1.1,1-2.4,1.7-3.8,2c-2.7,0.6-5.6-0.2-7.6-2.2l1.3-1.3c2.3,2,4.9,2.5,7.7,0.9C9097.7-10384.9,9098.9-10387,9098.9-10389.3z"/>
+	<path id="Path_141" class="st0" d="M9084.5-10385.8c-1-1.4-2.1-2.7-3.1-4.2h2.1c0-2.4,1-4.8,2.7-6.5c1.2-1.2,2.6-2,4.3-2.3
+		c3-0.7,6.1,0.2,8.3,2.4c-0.5,0.5-1,1-1.4,1.4c-2.6-2.2-5.4-2.6-8.4-1c-2.2,1.2-3.4,3.5-3.4,5.9h2.1
+		C9086.5-10388.6,9085.4-10387.1,9084.5-10385.8z"/>
+	<path id="Path_142" class="st0" d="M9099.4-10390h-2.1c1.1-1.4,2.1-2.7,3.1-4.2c1.1,1.4,2.1,2.7,3.1,4.2h-2.1
+		c0,2.5-1.1,4.9-2.9,6.6c-1.2,1.1-2.6,1.9-4.2,2.2c-3,0.7-6.1-0.2-8.3-2.4l1.4-1.4c2.5,2.2,5.4,2.7,8.4,1
+		C9098.1-10385.2,9099.4-10387.5,9099.4-10390z"/>
 </g>
 </svg>
diff --git a/svgicons/categories/math.svg b/svgicons/categories/math.svg
index 683a445d..55154015 100644
--- a/svgicons/categories/math.svg
+++ b/svgicons/categories/math.svg
@@ -8,12 +8,12 @@
 </style>
 <title>color</title>
 <g id="menu_icn_math" transform="translate(-9078.442 10583.172)">
-	<path id="Path_153" class="st0" d="M9087.4-10564.7c-0.2,0.2-0.5,0.5-0.7,0.7l-2.2-2.2c-0.8,0.8-1.5,1.5-2.2,2.2
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-	<path id="Path_154" class="st0" d="M9080.9-10575.6v-0.9h3.1v-3.1c0.3,0,0.6,0,0.9,0v3.1h3.1v0.9h-3.1v3.1h-1v-3.1H9080.9z"/>
-	<path id="Path_155" class="st1" d="M9098.5-10567.3h-7.8v-1.7h7.8V-10567.3z"/>
-	<path id="Path_156" class="st1" d="M9098.5-10565.6v1.7h-7.8v-1.7H9098.5z"/>
-	<path id="Path_157" class="st1" d="M9098.5-10577v1.7h-7.8v-1.7H9098.5z"/>
+	<path id="Path_153" class="st0" d="M9087.2-10563.2c-0.2,0.2-0.6,0.6-0.8,0.8l-2.6-2.6c-1,1-1.8,1.8-2.6,2.6
+		c-0.2-0.2-0.6-0.6-0.8-0.8l2.6-2.6c-1-1-1.8-1.8-2.6-2.6c0.2-0.2,0.6-0.6,0.8-0.8l2.6,2.6l2.6-2.6c0.2,0.2,0.6,0.6,0.8,0.8
+		l-2.6,2.6C9085.4-10564.9,9086.3-10564,9087.2-10563.2z"/>
+	<path id="Path_154" class="st0" d="M9079.3-10576.3v-1.1h3.7v-3.7c0.4,0,0.7,0,1.1,0v3.7h3.7v1.1h-3.7v3.7h-1.2v-3.7H9079.3z"/>
+	<path id="Path_155" class="st1" d="M9100.5-10566.3h-9.4v-2h9.4V-10566.3z"/>
+	<path id="Path_156" class="st1" d="M9100.5-10564.3v2h-9.4v-2H9100.5z"/>
+	<path id="Path_157" class="st1" d="M9100.5-10578v2h-9.4v-2H9100.5z"/>
 </g>
 </svg>
diff --git a/svgicons/categories/sensors.svg b/svgicons/categories/sensors.svg
index 80c8a759..db63e3c4 100644
--- a/svgicons/categories/sensors.svg
+++ b/svgicons/categories/sensors.svg
@@ -3,12 +3,10 @@
 <svg version="1.1" id="svg41" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
 	 viewBox="0 0 23 23" style="enable-background:new 0 0 23 23;" xml:space="preserve">
 <style type="text/css">
-	.st0{fill:none;stroke:#FFFFFF;stroke-width:0;stroke-linecap:round;stroke-linejoin:round;}
+	.st0{fill:#FFFFFF;}
 </style>
 <title>color</title>
-<g>
-	<circle class="st0" cx="11.5" cy="11.5" r="10"/>
-	<circle class="st0" cx="11.5" cy="11.5" r="7"/>
-	<circle class="st0" cx="11.5" cy="11.5" r="4"/>
-</g>
+<path class="st0" d="M11.5,1.8c-5.4,0-9.8,4.4-9.8,9.8c0,5.4,4.4,9.8,9.8,9.8s9.8-4.4,9.8-9.8C21.2,6.1,16.9,1.8,11.5,1.8z
+	 M11.5,18.3c-3.8,0-6.8-3.1-6.8-6.8s3.1-6.8,6.8-6.8s6.8,3.1,6.8,6.8S15.3,18.3,11.5,18.3z"/>
+<circle class="st0" cx="11.5" cy="11.5" r="3.9"/>
 </svg>
diff --git a/svgicons/categories/variables.svg b/svgicons/categories/variables.svg
index c50f843d..4df7d22e 100644
--- a/svgicons/categories/variables.svg
+++ b/svgicons/categories/variables.svg
@@ -3,27 +3,18 @@
 <svg version="1.1" id="svg41" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
 	 viewBox="0 0 23 23" style="enable-background:new 0 0 23 23;" xml:space="preserve">
 <style type="text/css">
-	.st0{clip-path:url(#SVGID_2_);}
-	.st1{fill:#FFFFFF;}
+	.st0{fill:#FFFFFF;}
 </style>
 <title>color</title>
-<g>
-	<defs>
-		<rect id="SVGID_1_" x="3" y="5" width="16" height="13"/>
-	</defs>
-	<clipPath id="SVGID_2_">
-		<use xlink:href="#SVGID_1_"  style="overflow:visible;"/>
-	</clipPath>
-	<g id="menu_icn_variables" transform="translate(-9077.432 10524.199)" class="st0">
-		<g transform="translate(-518.568 -458.199)">
-			<path id="Path_165" class="st1" d="M9615-10061v2h-16v-2H9615z"/>
-		</g>
-		<g transform="translate(-518.568 -453.199)">
-			<path id="Path_165-2" class="st1" d="M9615-10061v2h-16v-2H9615z"/>
-		</g>
-		<g transform="translate(-518.568 -448.199)">
-			<path id="Path_165-3" class="st1" d="M9615-10061v2h-16v-2H9615z"/>
-		</g>
+<g transform="translate(-518.568 -448.199)">
+	<path id="Path_165-3" class="st0" d="M539.7,464.3v2.4h-19.2v-2.4H539.7z"/>
+</g>
+<g transform="translate(-518.568 -453.199)">
+	<path id="Path_165-2" class="st0" d="M539.7,463.5v2.4h-19.2v-2.4H539.7z"/>
+</g>
+<g id="menu_icn_variables" transform="translate(-9077.432 10524.199)">
+	<g transform="translate(-518.568 -458.199)">
+		<path id="Path_165" class="st0" d="M9617.1-10061.5v2.4h-19.2v-2.4H9617.1z"/>
 	</g>
 </g>
 </svg>
diff --git a/theme/blockly.less b/theme/blockly.less
index d4ab53e3..0154b9ac 100644
--- a/theme/blockly.less
+++ b/theme/blockly.less
@@ -102,6 +102,9 @@ span.blocklyTreeIcon.blocklyTreeIconmath::before {
     content: "\f10c";
 }
 
+span.blocklyTreeIcon.blocklyTreeIconfunctions {
+    font-family: 'legoIcons' !important;
+}
 span.blocklyTreeIcon.blocklyTreeIconfunctions::before {
     content: "\f108";
 }