Traceback (most recent call last):
  File "PyPL.py", line 291, in redraw
    b = int(u.color[8:12], 16)
ValueError: invalid literal for int() with base 16: ''
Traceback (most recent call last):
  File "PyPL.py", line 291, in redraw
    b = int(u.color[8:12], 16)
ValueError: invalid literal for int() with base 16: ''
Traceback (most recent call last):
  File "PyPL.py", line 291, in redraw
    b = int(u.color[8:12], 16)
ValueError: invalid literal for int() with base 16: ''
Traceback (most recent call last):
  File "PyPL.py", line 291, in redraw
    b = int(u.color[8:12], 16)
ValueError: invalid literal for int() with base 16: ''
Traceback (most recent call last):
  File "PyPL.py", line 291, in redraw
    b = int(u.color[8:12], 16)
ValueError: invalid literal for int() with base 16: ''