import turtle              //importing turtle
turtle.speed(0)            // initializing turtle speed
window = turtle.Screen()
window.bgcolor("black")           //initializing background 
for i in range (5):               // for loop
   for colour in ["red","purple","green","orange","yellow","pink"]:     // nested loop
                            turtle.color(colour)              
                            turtle.pensize(3)                 // intializing pensize
                            turtle.left(12)                  //moves pen this degree leftward  
                            turtle.forward(200)                // moves the pen forward by a specific distance given in its arguements
                            turtle.left(90)
                            turtle.forward(200)
                            turtle.left(90)
                            turtle.forward(200)
                            turtle.left(90)
                            turtle.forward(200)
                            turtle.left(90)