Code Sketch

clear()
setSpeed(fast)
setPenColor(black)
setPenThickness(4)
originBottomLeft()
setBackground(yellow)


repeat(6) {
    repeat(6) {
        setFillColor(red)
        repeat(4) {
            forward(50)
            right()
        }
        hop(50)
        setFillColor(white)
        repeat(4) {
            forward(50)
            right()
        }
        hop(50)
    }
    hop(-50 * 12)
    right()
    hop(50)
    left()
    repeat(6) {
        setFillColor(white)
        repeat(4) {
            forward(50)
            right()
        }
        hop(50)
        setFillColor(red)
        repeat(4) {
            forward(50)
            right()
        }
        hop(50)
    }
    hop(-50 * 12)
    right()
    hop(50)
    left()

}

zoom(0.8)