import turtle
nivi=turtle.Turtle()
wn=turtle.Screen()

nivi.pensize(2)
nivi.speed(0)
colours='alice blue,AliceBlue,antique white,AntiqueWhite,AntiqueWhite1,AntiqueWhite2,AntiqueWhite3,AntiqueWhite4,aquamarine,aquamarine1,aquamarine2,aquamarine3,aquamarine4,azure,azure1,azure2,azure3,azure4,beige,bisque,bisque1,bisque2,bisque3,bisque4,black,blanched almond,BlanchedAlmond,blue,blue violet,blue1,blue2,blue3,blue4,BlueViolet,brown,brown1,brown2,brown3,brown4,burlywood,burlywood1,burlywood2,burlywood3,burlywood4,cadet blue,CadetBlue,CadetBlue1,CadetBlue2,CadetBlue3,CadetBlue4,chartreuse,chartreuse1,chartreuse2,chartreuse3,chartreuse4,chocolate,chocolate1,chocolate2,chocolate3,chocolate4,coral,coral1,coral2,coral3,coral4,cornflower blue,CornflowerBlue,cornsilk,cornsilk1,cornsilk2,cornsilk3,cornsilk4,cyan,cyan1,cyan2,cyan3,cyan4,dark blue,dark cyan,dark goldenrod,dark gray,dark green,dark grey,dark khaki,dark magenta,dark olive green,dark orange,dark orchid,dark red,dark salmon,dark sea green,dark slate blue,dark slate gray,dark slate grey,dark turquoise,dark violet,DarkBlue,DarkCyan,DarkGoldenrod,DarkGoldenrod1,DarkGoldenrod2,DarkGoldenrod3,DarkGoldenrod4,DarkGray,DarkGreen,DarkGrey,DarkKhaki,DarkMagenta,DarkOliveGreen,DarkOliveGreen1,DarkOliveGreen2,DarkOliveGreen3,DarkOliveGreen4,DarkOrange,DarkOrange1,DarkOrange2,DarkOrange3,DarkOrange4,DarkOrchid,DarkOrchid1,DarkOrchid2,DarkOrchid3,DarkOrchid4,DarkRed,DarkSalmon,DarkSeaGreen,DarkSeaGreen1,DarkSeaGreen2,DarkSeaGreen3,DarkSeaGreen4,DarkSlateBlue,DarkSlateGray,DarkSlateGray1,DarkSlateGray2,DarkSlateGray3,DarkSlateGray4,DarkSlateGrey,DarkTurquoise,DarkViolet,deep pink,deep sky blue,DeepPink,DeepPink1,DeepPink2,DeepPink3,DeepPink4,DeepSkyBlue,DeepSkyBlue1,DeepSkyBlue2,DeepSkyBlue3,DeepSkyBlue4,dim gray,dim grey,DimGray,DimGrey,dodger blue,DodgerBlue,DodgerBlue1,DodgerBlue2,DodgerBlue3,DodgerBlue4,firebrick,firebrick1,firebrick2,firebrick3,firebrick4,floral white,FloralWhite,forest green,ForestGreen,gainsboro,ghost white,GhostWhite,gold,gold1,gold2,gold3,gold4,goldenrod,goldenrod1,goldenrod2,goldenrod3,goldenrod4,gray,gray0,gray1,gray2,gray3,gray4,gray5,gray6,gray7,gray8,gray9,gray10,gray11,gray12,gray13,gray14,gray15,gray16,gray17,gray18,gray19,gray20,gray21,gray22,gray23,gray24,gray25,gray26,gray27,gray28,gray29,gray30,gray31,gray32,gray33,gray34,gray35,gray36,gray37,gray38,gray39,gray40,gray41,gray42,gray43,gray44,gray45,gray46,gray47,gray48,gray49,gray50,gray51,gray52,gray53,gray54,gray55,gray56,gray57,gray58,gray59,gray60,gray61,gray62,gray63,gray64,gray65,gray66,gray67,gray68,gray69,gray70,gray71,gray72,gray73,gray74,gray75,gray76,gray77,gray78,gray79,gray80,gray81,gray82,gray83,gray84,gray85,gray86,gray87,gray88,gray89,gray90,gray91,gray92,gray93,gray94,gray95,gray96,gray97,gray98,gray99,gray100,green,green yellow,green1,green2,green3,green4,GreenYellow,grey,grey0,grey1,grey2,grey3,grey4,grey5,grey6,grey7,grey8,grey9,grey10,grey11,grey12,grey13,grey14,grey15,grey16,grey17,grey18,grey19,grey20,grey21,grey22,grey23,grey24,grey25,grey26,grey27,grey28,grey29,grey30,grey31,grey32,grey33,grey34,grey35,grey36,grey37,grey38,grey39,grey40,grey41,grey42,grey43,grey44,grey45,grey46,grey47,grey48,grey49,grey50,grey51,grey52,grey53,grey54,grey55,grey56,grey57,grey58,grey59,grey60,grey61,grey62,grey63,grey64,grey65,grey66,grey67,grey68,grey69,grey70,grey71,grey72,grey73,grey74,grey75,grey76,grey77,grey78,grey79,grey80,grey81,grey82,grey83,grey84,grey85,grey86,grey87,grey88,grey89,grey90,grey91,grey92,grey93,grey94,grey95,grey96,grey97,grey98,grey99,grey100,honeydew,honeydew1,honeydew2,honeydew3,honeydew4,hot pink,HotPink,HotPink1,HotPink2,HotPink3,HotPink4,indian red,IndianRed,IndianRed1,IndianRed2,IndianRed3,IndianRed4,ivory,ivory1,ivory2,ivory3,ivory4,khaki,khaki1,khaki2,khaki3,khaki4,lavender,lavender blush,LavenderBlush,LavenderBlush1,LavenderBlush2,LavenderBlush3,LavenderBlush4,lawn green,LawnGreen,lemon chiffon,LemonChiffon,LemonChiffon1,LemonChiffon2,LemonChiffon3,LemonChiffon4,light blue,light coral,light cyan,light goldenrod,light goldenrod yellow,light gray,light green,light grey,light pink,light salmon,light sea green,light sky blue,light slate blue,light slate gray,light slate grey,light steel blue,light yellow,LightBlue,LightBlue1,LightBlue2,LightBlue3,LightBlue4,LightCoral,LightCyan,LightCyan1,LightCyan2,LightCyan3,LightCyan4,LightGoldenrod,LightGoldenrod1,LightGoldenrod2,LightGoldenrod3,LightGoldenrod4,LightGoldenrodYellow,LightGray,LightGreen,LightGrey,LightPink,LightPink1,LightPink2,LightPink3,LightPink4,LightSalmon,LightSalmon1,LightSalmon2,LightSalmon3,LightSalmon4,LightSeaGreen,LightSkyBlue,LightSkyBlue1,LightSkyBlue2,LightSkyBlue3,LightSkyBlue4,LightSlateBlue,LightSlateGray,LightSlateGrey,LightSteelBlue,LightSteelBlue1,LightSteelBlue2,LightSteelBlue3,LightSteelBlue4,LightYellow,LightYellow1,LightYellow2,LightYellow3,LightYellow4,lime green,LimeGreen,linen,magenta,magenta1,magenta2,magenta3,magenta4,maroon,maroon1,maroon2,maroon3,maroon4,medium aquamarine,medium blue,medium orchid,medium purple,medium sea green,medium slate blue,medium spring green,medium turquoise,medium violet red,MediumAquamarine,MediumBlue,MediumOrchid,MediumOrchid1,MediumOrchid2,MediumOrchid3,MediumOrchid4,MediumPurple,MediumPurple1,MediumPurple2,MediumPurple3,MediumPurple4,MediumSeaGreen,MediumSlateBlue,MediumSpringGreen,MediumTurquoise,MediumVioletRed,midnight blue,MidnightBlue,mint cream,MintCream,misty rose,MistyRose,MistyRose1,MistyRose2,MistyRose3,MistyRose4,moccasin,navajo white,NavajoWhite,NavajoWhite1,NavajoWhite2,NavajoWhite3,NavajoWhite4,navy,navy blue,NavyBlue,old lace,OldLace,olive drab,OliveDrab,OliveDrab1,OliveDrab2,OliveDrab3,OliveDrab4,orange,orange red,orange1,orange2,orange3,orange4,OrangeRed,OrangeRed1,OrangeRed2,OrangeRed3,OrangeRed4,orchid,orchid1,orchid2,orchid3,orchid4,pale goldenrod,pale green,pale turquoise,pale violet red,PaleGoldenrod,PaleGreen,PaleGreen1,PaleGreen2,PaleGreen3,PaleGreen4,PaleTurquoise,PaleTurquoise1,PaleTurquoise2,PaleTurquoise3,PaleTurquoise4,PaleVioletRed,PaleVioletRed1,PaleVioletRed2,PaleVioletRed3,PaleVioletRed4,papaya whip,PapayaWhip,peach puff,PeachPuff,PeachPuff1,PeachPuff2,PeachPuff3,PeachPuff4,peru,pink,pink1,pink2,pink3,pink4,plum,plum1,plum2,plum3,plum4,powder blue,PowderBlue,purple,purple1,purple2,purple3,purple4,red,red1,red2,red3,red4,rosy brown,RosyBrown,RosyBrown1,RosyBrown2,RosyBrown3,RosyBrown4,royal blue,RoyalBlue,RoyalBlue1,RoyalBlue2,RoyalBlue3,RoyalBlue4,saddle brown,SaddleBrown,salmon,salmon1,salmon2,salmon3,salmon4,sandy brown,SandyBrown,sea green,SeaGreen,SeaGreen1,SeaGreen2,SeaGreen3,SeaGreen4,seashell,seashell1,seashell2,seashell3,seashell4,sienna,sienna1,sienna2,sienna3,sienna4,sky blue,SkyBlue,SkyBlue1,SkyBlue2,SkyBlue3,SkyBlue4,slate blue,slate gray,slate grey,SlateBlue,SlateBlue1,SlateBlue2,SlateBlue3,SlateBlue4,SlateGray,SlateGray1,SlateGray2,SlateGray3,SlateGray4,SlateGrey,snow,snow1,snow2,snow3,snow4,spring green,SpringGreen,SpringGreen1,SpringGreen2,SpringGreen3,SpringGreen4,steel blue,SteelBlue,SteelBlue1,SteelBlue2,SteelBlue3,SteelBlue4,tan,tan1,tan2,tan3,tan4,thistle,thistle1,thistle2,thistle3,thistle4,tomato,tomato1,tomato2,tomato3,tomato4,turquoise,turquoise1,turquoise2,turquoise3,turquoise4,violet,violet red,VioletRed,VioletRed1,VioletRed2,VioletRed3,VioletRed4,wheat,wheat1,wheat2,wheat3,wheat4,white,white smoke,WhiteSmoke,yellow,yellow green,yellow1,yellow2,yellow3,yellow4,YellowGreen'
color=colours.split(',')
import random
isgoing=False
def pattern():
 global isgoing
 isgoing=True
 times=random.randrange(30,81)
 sign=random.randrange(-1,1)
 if sign==-1:
     fwd=random.randrange(-110,0)
 if sign==0:
    fwd=random.randrange(0,111)
 angle=random.randrange(-360,361)
 print(' Loop times:{}\n base forward:{}\n forward:loop count+base forward\n left turn angle:{}\n radius of circle=forward'.format(times,fwd,angle))
 bgcolr=random.choice(color)
 wn.bgcolor(bgcolr)
 for i in range(times):
    colr=random.choice(color)
    nivi.color(colr)

nivi.forward(fwd+i)
    nivi.left(angle)
    nivi.circle(fwd+i)
 isgoing=False   
 nivi.hideturtle()

def click(x,y):
 
 if not isgoing:
     print("")
     nivi.penup()
     nivi.goto(0,0)
     nivi.pendown()
     nivi.clear()
     pattern()
pattern() 
wn.onclick(click)
wn.listen()

Patter generator(circle version)