How to use? You kinda have to play with the arcs values to understand them but bassicly:
Arc - single line that is drawn on mouse move
Line Witdh - starting Arc width
Number of Lines - number of segments that every Arc is made of
Line Decay - amount of width decay with every another segment of single Arc
Arc Stability - multiplier of the Arc direction sustain(segments become longer and more stable towards Arc's random direction)
Arc Unstability - amount of segments random direction(segments become longer but they are wilder as well)
Hue Variation - amount of color hue randomness of every Arc
Saturation - amount of arc saturation(not random)
Shortcuts:
Ctrl + Z to undo last change
Ctrl + C to change the arc color
Ctrl + R to clear the drawing area
Arrow keys are used to set the direction of shadow when it is enabled but that function turned out to be kinda pointless
