ID:268437
 
How do you put to icons together like 1 icon is the body and the other icon is the head .
Do you mean a mob that uses 2 icons?
Use overlays. Create a new object, give the object the desired icon and icon state, change the object's pixel_y to 32, add the object to the mob's overlay's list, delete the object. You can delete the object because the object itself is not really going into the list, rather an image of the object's icon is.
In response to Artekia
yes . i saw 1 code thing but forgot what it was that allowed you to have a mob that use 4 icons
In response to Loduwijk
I don't real understand that . Do you know of a code that allows a mob to use 2 or more icons that i can just put in the game and i will edit the part that need to be edited ?
there's a demo on this and its simple to understand:

Multi Tiled Mobs Demo by Pillsverry and Rcet
In response to DeathAwaitsU
Is there 1 that makes a multitiled object like a bus or long truck and add verbs like drive and stop driving where it changes the mobs icon to a mulitiled truck or bus ?
In response to Contract Jack
Usually demos don't get that specific. You're gonna have to find out how to make multi-tiled mobs, and go from there and figure things out.