def mouse_click(x,y):
global big_bang
if selected != 'Special' and selected != 'Remove':
add(eval(selected+'(' + str(x) + ',' + str(y) + ')'))
elif selected == 'Special':
if big_bang == None:
print('Big Bang Started')
big_bang = Special(x,y)
else:
removeset = find(lambda item:True if item.contains((x,y)) else False)
for item in removeset:
remove(item)
if big_bang != None:
if big_bang.contains((x,y)):
print('Big Bang Stopped')
big_bang = None
