pxt-calliope/docs/projects/flashing-heart.md
2016-10-03 18:55:09 -07:00

116 lines
1.6 KiB
Markdown

# flashing heart
![](/static/mb/projects/a1-display.png)
### ~avatar avatar
```sim
basic.forever(() => {
basic.showLeds(`
. # . # .
# # # # #
# # # # #
. # # # .
. . # . .`);
basic.pause(500);
basic.clearScreen();
basic.pause(500);
})
```
Use the LEDs to display a flashing heart, and then create
an animation of a broken heart. :(
### ~
## Step 1
Use [show leds](/reference/basic/show-leds) and make your code look like this:
```blocks
basic.showLeds(`
. # . # .
# # # # #
# # # # #
. # # # .
. . # . .`);
```
## Step 2
Add a [pause](/reference/basic/pause) to wait and [clear screen](/reference/basic/clear-screen) to turn off the LEDs.
```blocks
basic.showLeds(`
. # . # .
# # # # #
# # # # #
. # # # .
. . # . .`);
basic.pause(500);
basic.clearScreen();
```
## Step 3
Put a [forever loop](/reference/basic/forever) around it.
```blocks
basic.forever(() => {
basic.showLeds(`
. # . # .
# # # # #
# # # # #
. # # # .
. . # . .`);
basic.pause(500);
basic.clearScreen();
})
```
## Step 4
Add a [pause](/reference/basic/pause) to wait after clearing the screen.
```blocks
basic.forever(() => {
basic.showLeds(`
. # . # .
# # # # #
# # # # #
. # # # .
. . # . .`);
basic.pause(500);
basic.clearScreen();
basic.pause(500);
})
```
## Step 5
Add a second image of a broken heart.
```blocks
basic.forever(() => {
basic.showLeds(`
. # . # .
# # # # #
# # # # #
. # # # .
. . # . .`);
basic.pause(500);
basic.clearScreen();
basic.pause(500);
basic.showLeds(`
. # . # .
# . # # #
# . . . #
. # # # .
. . # . .`);
basic.pause(500);
basic.clearScreen();
basic.pause(500);
})
```