Welcome to the forums @EAK
You can use the _draw function in any node that extends CanvasItem to draw in 2D. For example, you could use something like this to draw a 200px line using the draw_line (documentation) function:
func _draw():
draw_line(Vector2.ZERO, Vector2(0, 100), Color.red)
The documentation has a page on custom drawing in 2D that might help.
The gradients might be harder though, as I do not think there is a easy way to do this in Godot with built-in functions. You may need to write a custom shader to give the lines gradients.
Also:
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If you need any help, please let us know! Thanks! :smile:
