diff --git a/libs/core/_locales/core-jsdoc-strings.json b/libs/core/_locales/core-jsdoc-strings.json
index 05790ac2..a9ba7ca1 100644
--- a/libs/core/_locales/core-jsdoc-strings.json
+++ b/libs/core/_locales/core-jsdoc-strings.json
@@ -20,6 +20,7 @@
   "input.remoteTopRight": "Remote top-right button.",
   "output.createBuffer": "Create a new zero-initialized buffer.",
   "output.createBuffer|param|size": "number of bytes in the buffer",
+  "output.getPattern": "Pattern block.",
   "output.setLights": "Set lights.",
   "screen.clear": "Clear screen and reset font to normal.",
   "screen.doubleIcon": "Double size of an icon.",
diff --git a/libs/core/_locales/core-strings.json b/libs/core/_locales/core-strings.json
index 5744a682..05383711 100644
--- a/libs/core/_locales/core-strings.json
+++ b/libs/core/_locales/core-strings.json
@@ -16,7 +16,8 @@
   "input.remoteTopLeft|block": "remote top-left",
   "input.remoteTopRight|block": "remote top-right",
   "input|block": "input",
-  "output.setLights|block": "set lights %pattern",
+  "output.getPattern|block": "%pattern",
+  "output.setLights|block": "set lights %pattern=led_pattern",
   "output|block": "output",
   "screen|block": "screen",
   "serial|block": "serial",
diff --git a/libs/core/buttons.ts b/libs/core/buttons.ts
index 7811bad5..beecdc88 100644
--- a/libs/core/buttons.ts
+++ b/libs/core/buttons.ts
@@ -216,8 +216,8 @@ namespace output {
     /**
      * Set lights.
      */
-    //% blockId=setLights block="set lights %pattern" 
-    export function setLights(pattern: LightsPattern): void {
+    //% blockId=setLights block="set lights %pattern=led_pattern" 
+    export function setLights(pattern: number): void {
         if (currPattern === pattern)
             return
         currPattern = pattern
@@ -225,4 +225,15 @@ namespace output {
         cmd[0] = pattern + 48
         input.internal.getBtnsMM().write(cmd)
     }
+
+
+    /**
+     * Pattern block.
+     */
+    //% blockId=led_pattern block="%pattern"
+    //% shim=TD_ID colorSecondary="#6e9a36"
+    //% blockHidden=true
+    export function getPattern(pattern: LightsPattern): number {
+        return pattern;
+    }
 }