SPACE KEY: Pen up CLICK ON CANVAS: Pen down "C" KEY: Clear CLICK ON COLORS TO CHANGE PEN COLOR That should be all you need :D For some reason, the only way to change the thickness slider is to press stop sign, change it, then press green flag. Sorry!
KEEP IN MIND THAT THIS IS THE FIRST VERSION. Leave suggestions in the comments; I will try to add it to the best of my power. Keep in mind I am not @griffpatch or @WO997 :) Feel free to remix! May 10 2016 - RELEASE! May 11 2016 - green flag clear feature, fixed color bug. You can now use all the colors! Also, added "Thickness" slider