Code Sketch

clear()
showAxes()
setSpeed(fast)
setPenColor(red)
setPenThickness(5)
setFillColor(green)
repeat(4){
forward(100)
right()
}
left()
repeat(4){
forward(100)
right()
}
right()
hop(100)
right()
hop(100)
left()
setPenColor(green)
setPenThickness(5)
setFillColor(red)
repeat(4){
forward(100)
right()
}
left()
repeat(4){
forward(100)
right()
}
right()
hop(100)
right()
hop(100)
left()
setPenColor(red)
setPenThickness(5)
setFillColor(yellow)
repeat(4){
forward(100)
right()
}
left()
repeat(4){
forward(100)
right()
}