thanks xD I aprecciate your opinions guys. Pity that I don't know command which make move characters during the train move up down.
"zoffsetlink = elem_ID If this parameter is specified, it links the zoffset value to the y-position of a background element with the specified ID number. For example, you can link the value to a dummy element (see Other background element types) with a sin.y parameter to make the characters bob up and down in a sinusoidal fashion."
For example, give an id to your [BG 200], and gives that id to the zoffsetlink to be added to your [StageInfo]. Well, I guess there will be something to fix after you try to add a zoffsetlink though....for example, to make a dummy BG animation besides BG 200, only for the zoffsetlink.............