[farshizzo]

Hi,

Yeah, it is kind of weird. I've fixed it so that your previous code will work in future versions.

Regarding your other problem, the following code works fine over here:

class TrailClass:
	def __init__(self):
		
		viz.startlayer(viz.LINE_STRIP) 
		viz.vertexcolor(viz.RED) 
		viz.linewidth(1) 
		
		for x in range(400): 
			viz.vertex(x,0.3,0) 
		self.trail = viz.endlayer(viz.SCREEN) 

lines = TrailClass()

In the for loop where you declare each vertex will you try printing out the value of x and let me know what the output is?