[Solved] How to add a space between a string for every 5th letter? [duplicate]

pile1_str = "pile 1: "
x="O"
y=1
while y <= pile1:
    pile1_str = pile1_str + x
    if y%1==0:
        pile1_str = pile1_str + " "
    print(pile1_str)
    y= y+1