70's or 80's animated short

Ok, I can't remember what the movie is actually about, or what the characters look like ((except that the main hero is a young boy)), but I recall one scene in the movie where they (he and his two companions...I don't recall what they look like), have to perform certain unfesable tasks: One...

I'm looking for the name of a movie that I watched in the 80's, possibly made for tv. I remember it having a very depressing tone and I think it was about animals. I remember scenes of some kind of an animal that had to keep walking around a tree pushing a bar of some sort and it would slide him...

I'm looking for a maybe 70's but probably 80's animated movie... All I can remember is the cover of the VHS having a tree on it with a bunch of little.. Creatures underneath... I just remember being really into this movie. If anyone has an idea what it is called that would be awesome! Any ideas...

Visually, it's very similar to Wizards and Heavy Metal. It looks as if it was made in the late 70's or early 80's. It's one of those really trippy, pretty damn messed up animations. I can't remember what the plot was exactly, but here's what I can recall from it. The bad guy character was a...

There is a young boy. I think he is blonde. If I remember correctly he gets stuck a strange world with strange/scary creatures. Also in the film there is an old bald man. He has a patch on his head covering a wound/scar. I think its the boy who has grown up into the old man. The scar on his head is...