MC draw grid

https://makecode.com/_WHWfz91Lc5eR
https://sites.google.com/site/akulcsarsite/makecode/makecode-arcade

enum SpriteKindLegacy {
    Player,
    Projectile,
    Food,
    Enemy
}
controller.left.onEvent(ControllerButtonEvent.Pressed, function () {
    grid.moveLeft(mySprite)
})
controller.down.onEvent(ControllerButtonEvent.Pressed, function () {
    grid.moveDown(mySprite, false)
})
controller.B.onEvent(ControllerButtonEvent.Pressed, function () {
    rows += 1
    setGridSize()
    drawGrid()
})
function drawGrid () {
    grid.drawGrid(bg, 7)
}
controller.A.onEvent(ControllerButtonEvent.Pressed, function () {
    columns += 1
    setGridSize()
    drawGrid()
})
controller.right.onEvent(ControllerButtonEvent.Pressed, function () {
    grid.moveRight(mySprite, false)
})
function setGridSize () {
    grid.setSize(rows, columns)
    grid.setSpriteLocation(mySprite, 0, 0)
}
controller.up.onEvent(ControllerButtonEvent.Pressed, function () {
    grid.moveUp(mySprite)
})
let rows = 0
let columns = 0
let bg: Image = null
let mySprite: Sprite = null
mySprite = sprites.create(img`
    . . . . . . . e e e e . . . . .
    . . . . . e e 4 5 5 5 e e . . .
    . . . . e 4 5 6 2 2 7 6 6 e . .
    . . . e 5 6 6 7 2 2 6 4 4 4 e .
    . . e 5 2 2 7 6 6 4 5 5 5 5 4 .
    . e 5 6 2 2 8 8 5 5 5 5 5 4 5 4
    . e 5 6 7 7 8 5 4 5 4 5 5 5 5 4
    e 4 5 8 6 6 5 5 5 5 5 5 4 5 5 4
    e 5 c e 8 5 5 5 4 5 5 5 5 5 5 4
    e 5 c c e 5 4 5 5 5 4 5 5 5 e .
    e 5 c c 5 5 5 5 5 5 5 5 4 e . .
    e 5 e c 5 4 5 4 5 5 5 e e . . .
    e 5 e e 5 5 5 5 5 4 e . . . . .
    4 5 4 e 5 5 5 5 e e . . . . . .
    . 4 5 4 5 5 4 e . . . . . . . .
    . . 4 4 e e e . . . . . . . . .
`, SpriteKindLegacy.Player)
bg = image.create(scene.screenWidth(), scene.screenHeight())
columns = 4
rows = 3
scene.setBackgroundImage(bg)
grid.allowWrap(true)
grid.setSpriteVelocity(150)
setGridSize()
drawGrid()