When I click a button I want a image to slowly appear from the bottom of the screen

[mwood]

Animation in App Lab is not the same (or as easy) as animation in Game Lab because App Lab is event driven, so you can only do animation with the timed loop.

Here is a link to a previous post with more of an explanation (and links at the end with other examples).

Making an Image move in the app clicker game

Big picture: the topic of animation is a source of confusion both in App Lab AND generally. Generally speaking you can’t use loops to create animation effects in App Lab - this has to do with the event-driven paradigm of App Lab. If you’re running a loop, that takes over the machine and it can’t do other things in parallel, like listen for events. The source of confusion is of our own making – when you use loops with the Turtle it does cause an animation-like effect. That’s because we did b…

In your case, in line 402 of your code, you try to set the position of the spaceship, but there are two problems. One, the “id” needs to be replaced with the id of the element you are wanting to move (the spaceship). Also you are setting it to an absolute position. You will need to think about how to use a variable to change that position for each pass of the timed loop so that position isn’t a static one.

Hopefully that helps a little, but feel free to check back in.

Mike

Mike