python turtle animation 15

import turtle as t
#subhanker codes#subhanker codes#subhanker codes
t.speed(0)#subhanker codes#subhanker codes
#subhanker codes
t.bgcolor('black')
#subhanker codes
r,g,b=255,0,0#subhanker codes#subhanker codes
#subhanker codes
for i in range(255*2):
      #subhanker codes
      t.colormode(255)
      #subhanker codes
      if i<255//3:
           b+=3
      elif i<255*2//3:           
            r-=3
      elif i<255:
            g+=3
      elif i<255*4//3:
            b-=3
      elif i<255*5//3:        
            r+=3
      else:
            g-=3
        #subhanker codes    
      t.fd(i)#subhanker codes
      #subhanker codes
      t.rt(90)#subhanker codes
      #subhanker codes
      t.fd(i)  #subhanker codes
      #subhanker codes
      t.rt(89.9)  #subhanker codes
      #subhanker codes
      t.pencolor(r,g,b)  #subhanker codes
     #subhanker codes#subhanker codes
t.done()  #subhanker codes
  #subhanker codes#subhanker codes