import turtle
def window(colr, ttle):
    w = turtle.Screen()
    w.bgcolor(colr)
    w.title(ttle)
    return w

def turtle(colour, size):
    t = turtle.Turtle()
    t.color(colour)
    t.pensize(size)
    return t
def circle(pt1, diam):
    arc = diam * 3.14159265358979332 / 360
    for i in range(0,360):
        pt1.forward(arc)
        pt1.left(1)

wn = window("lightgreen", "Task 6")
t1 = turtle("hotpink", 5)

circle(t1, 100)
wn.mainloop()