from turtle import * #imports the libraries
import random

def regshape(x,y):                  #regshape could be used to create any regular shape
    for i in range(0,x):            #x is the no of sides
        forward(y)                  #y is the length of each side
        right(180-((180*(x-2))/x))  #this is the formula for an exterior angle of a regular polygon

colorsred = ["#330000", "#660000", "#990000", "#cc0000", "#ff0000", "#ff3333"]
colorsyellow = ["#332900", "#665200", "#997a00", "#cca300", "#ffcc00", "#ffd633"]
colorsgreen = ["#003300", "#006600", "#009900", "#00cc00", "#00ff00", "#33ff33"]
colorscyan = ["#003333", "#006666", "#009999", "#00cccc", "#00ffff", "#33ffff"]
colorsblue = ["#000033", "#000066", "#000099", "#0000cc", "#0000ff", "#3333ff"]
colorspurple = ["#260033", "#4c0066", "#730099", "#9900cc", "#bf00ff", "#cc33ff"]
colors = ["#000000"]

#choose pensize
while True:
    try:
        size = int(input("Enter the pensize (Must be 10 or lower.)"))
    except Exception:
        size = 12
    if size > 11:
        print("Please enter an integer that is 10 or lower.")
    elif size < 1:
        print ("Please don't.")
    else:
        pensize(size)
        break
    
#choose no. of shapes per rotation
while True:
    try:
        loopno = int(input("Input the number of shapes you want in one rotation. (A lower value is recommended.)"))
    except Exception:
        loopno = 0
    if loopno < 1:
        print ("Please enter a positive integer.")
    elif loopno > 5000:
        print ("I don't even know if it works with a loop number this high.")
        print ("Go ahead if you really want to watch the shape redraw itself over and over again without moving.")
        break
    elif loopno > 30:
        print ("This won't be as fun as you seem to think it will.")
        break
    else:
        break
            
                
    

#choose colours
while True:
    colorchoice = input("What colour do you want the shapes to be (red, yellow, green, cyan, blue or purple)?")
    if colorchoice == "red":
        colors = colorsred
        break
    elif colorchoice == "yellow":
        colors = colorsyellow
        break
    elif colorchoice == "green":
        colors = colorsgreen
        break
    elif colorchoice == "cyan":
        colors = colorscyan
        break
    elif colorchoice == "blue":
        colors = colorsblue
        break
    elif colorchoice == "purple":
        colors = colorspurple
        break

    else:
        print("Enter red, yellow, green, cyan, blue or purple.")

#option to add more colours
while True:
    colorchoice = input("Do you want to add another colour? If you do, type the colour. If not, type 0.")
    if colorchoice == "red":
        colors.extend(colorsred)
    elif colorchoice == "yellow":
        colors.extend(colorsyellow)
    elif colorchoice == "green":
        colors.extend(colorsgreen)
    elif colorchoice == "cyan":
        colors.extend(colorscyan)
    elif colorchoice == "blue":
        colors.extend(colorsblue)
    elif colorchoice == "purple":
        colors.extend(colorspurple)
    elif colorchoice == "0":
        break
    else:
        print("Enter red, yellow, green, cyan, blue or purple, or 0 if you don't want another colour.")



#choose background colour
while True:
    colorchoice = input("What colour do you want the background to be (red, yellow, green, cyan, blue, purple, black or white)?")
    if colorchoice == "red":
        bgcolor('#ffcccc')
        break
    elif colorchoice == "yellow":
        bgcolor('#fff5cc')
        break
    elif colorchoice == "green":
        bgcolor('#ccffcc')
        break
    elif colorchoice == "cyan":
        bgcolor('#ccffff')
        break
    elif colorchoice == "blue":
        bgcolor('#ccccff')
        break
    elif colorchoice == "purple":
        bgcolor('#f2ccff')
        break
    elif colorchoice == "black":
        bgcolor('#000000')
        break
    elif colorchoice == "white":
        break
    else:
        print("Enter red, yellow, green, cyan, blue, purple, black or white.")


        

while(True):                         #sets the program to keep drawing forever
    color(random.choice(colors))     #chooses one colour from the list
    sidelen=(random.randint(20,100)) #sets the side length to something between 20-100 inc.
    sideno=(random.randint(3,8))     #sets the number of sides to between 3-8 inc.
    for i in range(0,loopno):        #repeats the loop the number of times specified by the user at the beginning
        regshape(sideno,sidelen)     #replaces x and y in the definition of regshape with sideno and sidelen
        right(360/loopno)