Hands are not cleared always and there is a conflict inside getCoordinates method

[PeriniM]

When I draw the hand on the screen It doesn't refresh every frame but sometimes some points remain on the screen. I am currently using scene.remove() to remove the hand points but it doesn't always work apparently.

Inside getCoordinates method whenever I choose to get coordinates of a single finger together with the full hand I get strange coordinates due to the fact that I think they keep modifying the same variable even though I reinitialize it every time, strange. Need to fix that in the same method or spit it in two methods.