2.1.28, initiation update to PXT v5.28.24 (#54)

docs/projects/love-meter.md

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+# Love Meter
+
+## Introduction @unplugged
+
+Make a love meter, how sweet! The @boardname@ is feeling the love, then sometimes not so much!
+Tell everyone who you are. Show you name on the LEDs.
+
+![Love meter banner message](/docs/calliope/tutorials/05_love_meter_animation.gif)
+
+## Step 1
+
+Let's build a **LOVE METER** machine. Place an ``||input:on pin pressed||`` block to run code when pin **0** is pressed. Use ``P0`` from the list of pin inputs.
+
+```blocks
+input.onPinPressed(TouchPin.P0, () => {
+});
+```
+
+## Step 2
+
+Using ``||basic:show number||`` and ``||Math:pick random||`` blocks, show a random number from `0` to `100` when pin **0** is pressed.
+
+```blocks
+input.onPinPressed(TouchPin.P0, () => {
+    basic.showNumber(Math.randomRange(0, 100));
+});
+```
+## Step 3
+
+Click on pin **0** in the simulator and see which number is chosen.
+
+## Step 4
+
+Show ``"LOVE METER"`` on the screen when the @boardname@ starts.
+
+```blocks
+basic.showString("LOVE METER");
+input.onPinPressed(TouchPin.P0, () => {
+    basic.showNumber(Math.randomRange(0, 100));
+});
+```
+
+## Step 5
+
+Click ``|Download|`` to transfer your code in your @boardname@. Hold the **GND** pin with one hand and press pin **0** with the other hand to trigger this code.