Code Sketch

size(900, 900)
cleari()

initRandomGenerator(-4773392619599392335L)
originBottomLeft()
setBackground(black)

val tileCount = 4
val tileSize = cwidth / tileCount

def circ(n : Boolean,size: Double) = Picture {
    var a = 1
    if (n) {
        a = -1
    }
    setPenThickness(3)
    for (i <- 1 to random(20, 55)) {
    setPenColor(randomColor)
    repeat(6) {
        forward(5 + i*5)
        right(a * 60)
    }
    left(a * 90)
    hop(5)
    right(a * 90)
    hop(-2.5)
}
    
}

def shape = trans(tileSize/2, tileSize/2) -> circ(randomBoolean ,0.5 * tileSize)

def block(posX: Double, posY: Double) {
    val pic = shape
    pic.setPosition(posX, posY)
    pic.setPenColor(randomColor)
    draw(pic)
}

repeatFor(rangeTill(0, cheight, tileSize)) { posY =>
    repeatFor(rangeTill(0, cwidth, tileSize)) { posX =>
        block(posX, posY)
    }
}