You want to move a div inside of a parent from edge to edge in a dynamic random diagonally. That is, for example, starting in the middle of the left edge, then the unit is moving diagonally upwards, reaches the top boundary, and then begins again diagonally down, and so on to infinity.
Don't know how clearer to explain before was the screen saver of the old TV of Samsung, there's the logo from left to right, top to bottom gradually moved diagonally until reaching the boundaries of the screen, and then again, and again, and again. SFII wanted to find but not found.
Very interested in a turnkey solution, the name or a hint in the realization of (the order of action, how it should work).
I'm sorry for this weird description of the functionality, but searches have not crowned success.
Here found something similar, only it is necessary with uniform speed: