Code Sketch

def star() {
    repeat(5) {
        forward(50)
        right(144)
        forward(50)
        right(288)
    }
}
var clr = red.fadeOut(0.1)
clear()
setSpeed(superFast)
left()
hop(300)
right()
hop(50)
setBackgroundH(Color(24, 71, 47), Color(186, 237, 136))

def block() {
    setFillColor(black)
    setPenColor(noColor)
    right(18)
    star()
    hop(100)
}
def block3() {
    clr = clr.spin(18)
    setFillColor(clr)
    setPenColor(noColor)
    right(18)
    star()
    hop(100)
}

def block2(){repeat(20) {
    block
}}
block2()
left()
hop(5)
right()
hop(5)
repeat(20) {
    block3()
}
invisible()