If you want gravity take it from the player sprite! Also if you want to make ground really easily with a tiny 14x14 sprite/block take the script from the ground sprite! And lastly if you want a hacked block, which is completely red and called undefined take it from here! Also take the music from here if you want.
Thanks to @Blue-Monkey for teaching me about the useless hacked block. Thanks to @Pickledorf and @roryj45 for the music! I thought of this gravity script myself if anyone else has used it before me, my apologies to them but, I did NOT take it from their game other wise I would have thanked them. THERE IS A SECRET ILLUMINATI EASTER EGG!