import Blender

plane = Blender.BGL.Buffer(Blender.BGL.GL_FLOAT, 4, [0.0, 1.0, 0.0, 0.0])

def draw():
	
	Blender.BGL.glClipPlane(Blender.BGL.GL_CLIP_PLANE0, plane)
	Blender.BGL.glColor3f(0.0,0.0,0.0)
	Blender.BGL.glEnable(Blender.BGL.GL_CLIP_PLANE0)
	Blender.BGL.glRecti(100,100,400,400)
	Blender.BGL.glDisable(Blender.BGL.GL_CLIP_PLANE0)
	
Blender.Draw.Register(draw)