Im making a platform game and just check it out, I need to know how to make platforms! (You will know what I mean when I say how do I make platforms for the main sprite {Hus})

If you mean how to make the platform itself, then create a new backdrop and draw the platforms on.
If you mean creating the game, and not making the main sprite float in mid-air, then check out this gravity topic:
http://archive.scratch.mit.edu/forums/viewtopic.php?pid=1117338#p1117338