say you have two of the black ramp peices next to each other and on top of the second one you place the upside down black ramp peice that you use to make the loops i am talking about a block that would go on top of the first peice to smoothly connect it to curved black ramp that is on top of the second ramp kind of like how you would use the triangle gray track peice on the gray square track peice or how you would use the gray triangle decoration peice to smoth out corners between gray block decoration pecies