pxt-calliope/docs/projects/love-meter.md
2016-06-11 17:12:12 -04:00

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![](/static/mb/projects/a3-pins.png)
Use pins P0, P1 and P2 to change the display by creating a circuit with your body.
## Step 1
Use [on pin pressed](/reference/input/on-pin-pressed) to show a random number
when pin P0 is pressed (hold the GND pin with other hand):
```blocks
input.onPinPressed(TouchPin.P0, () => {
basic.showNumber(Math.random(11));
});
```
## Step 2
Show a string when pin P1 is pressed:
```blocks
input.onPinPressed(TouchPin.P0, () => {
basic.showNumber(Math.random(11));
});
input.onPinPressed(TouchPin.P1, () => {
basic.showString("LOVE?");
});
```
## Step 3
Show a heart when pin P2 is pressed:
```blocks
input.onPinPressed(TouchPin.P0, () => {
basic.showNumber(Math.random(11));
});
input.onPinPressed(TouchPin.P1, () => {
basic.showString("LOVE?");
});
input.onPinPressed(TouchPin.P2, () => {
basic.showLeds(`
. # # # .
# # # # #
# # # # #
. # # # .
. . # . .
`);
});
```