import turtle as t1
t1.getscreen()
t1.penup()
t1.goto(200,200)
t1.pendown()
t1.fillcolor("grey")
t1.begin_fill()
t1.goto(-200,200)
t1.goto(-200,-200)
t1.goto(200,-200)
t1.goto(200,200)
t1.end_fill()
txy=[(150,150,"olive"),(-25,150,"orange"),(-25,-25,"lightgreen"),(150,-25,"purple")]
for xyc in txy:
    x,y,c=xyc
    t1.penup()
    t1.goto(x,y)
    t1.pendown()
    t1.fillcolor(c)
    t1.begin_fill()
    t1.goto(x-125,y)
    t1.goto(x-125,y-125)
    t1.goto(x,y-125)
    t1.goto(x,y)
    t1.end_fill()
t1.hideturtle()
t1.done()