Timer15

Timer15.js

let posY = 0
let posX = 0
let expiretime = 0
let TimerValue = 0
let setTimer = 0
input.onButtonPressed(Button.A, () => {
    setTimer = 0
    TimerValue = 0
    expiretime = 0
    posX = 0
    posY = 0
    setTimer += 1
    if (setTimer == 5) {
        setTimer = 0
        basic.showLeds(`
            . . # . .
            . . # . .
            # # # # #
            . . # . .
            . . # . .
            `)
    }
    if (setTimer == 1) {
        basic.showLeds(`
            . . # # #
            . . # # #
            # # # # #
            . . # . .
            . . # . .
            `)
    } else if (setTimer == 2) {
        basic.showLeds(`
            . . # # #
            . . # # #
            # # # # #
            . . # # #
            . . # # #
            `)
    } else if (setTimer == 3) {
        basic.showLeds(`
            . . # # #
            . . # # #
            # # # # #
            # # # # #
            # # # # #
            `)
    } else if (setTimer == 4) {
        basic.showLeds(`
            # # # # #
            # # # # #
            # # # # #
            # # # # #
            # # # # #
            `)
    }
    TimerValue = setTimer * 15
    expiretime = TimerValue * 60 / 25
})
input.onButtonPressed(Button.B, () => {
    basic.showLeds(`
        # # # # #
        # # # # #
        # # # # #
        # # # # #
        # # # # #
        `)
    for (let i = 0; i < 5; i++) {
        for (let i = 0; i < 5; i++) {
            basic.pause(expiretime * 1000)
            led.unplot(posX, posY)
            posX += 1
        }
        posX = 0
        posY += 1
    }
    basic.showIcon(IconNames.No)
    for (let i = 0; i < 10; i++) {
        led.enable(false)
        basic.pause(100)
        led.enable(true)
        basic.pause(100)
    }
})
input.onButtonPressed(Button.AB, () => {
    basic.clearScreen()
    basic.showNumber(expiretime)
})
led.setBrightness(255)
setTimer = 0
TimerValue = 0
expiretime = 0
posX = 0
posY = 0
basic.showLeds(`
    . . # . .
    . . # . .
    # # # # #
    . . # . .
    . . # . .
    `)

Timer15 is a countdown that has four possible timer sets:
15, 30, 45, or 60 minutes

After booting, a cross on display appears, and you can set your timer pressing the A button. Each time you press A button, the timer increases by 15 minutes till reaching 60 minutes

timer set at 15min

timer set at 30min

timer set at 45min

timer set at 60min

To start the timer press button B. At the beginning all 25 the leds are turned on, and after a specific amount of time depending on the timer setting, a led goes off

When the timer expires an X appears on the screen (blinking at the beginning then fixed)