I have a sprite on a trampoline bouncing up and down to the same height. As a newbie, that bit was easy to do.
What I can't work out how to do is to gradually increase the height of the bounce and gradually decrease it once it gets to a set height (so it doesn't go too high). In other words I need to vary the height of the bounce within set heights. (i.e If at Y>150 then increase bounce and if Y<50 then decrease it).