The actor names are case sensitive: change "rcollar" to "rCollar" and "lcollar" to "lCollar".
That's the cause of the "Figure has no actor by that name" exception.

The cause of the "continue not properly in loop" exception might be caused by an indentation error: make sure the "continue" statement is at exact the same indentation level as the
statiement below the "try"
If you just copy/pasted the Python code in your post, this is the most likely cause.

The pen is mightier than the sword. But if you literally want to have some impact, use a typewriter

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