eastern-flames/eastern flames/scripts/c_selectunit/c_selectunit.gml

function c_selectunit(unitobject) {
	unitobject.state = st_moving;
	unitobject.drawstate = st_movingdraw;
	unitobject.returnpos = new vec2(unitobject.pos.x, unitobject.pos.y);
	var mov = 2//DONT
	var i, j;
	for (i=-mov; i<=mov; i++) {
		for (j=-mov; j<=mov; j++) {
			if abs(i)+abs(j) <= mov {
				c_colortile(unitobject.pos.x+i, unitobject.pos.y+j, c_cyan);
			}
		}
	}
}

function c_colortile(x, y, color) {
	if !c_tileexists(x, y) return false;
	if !array_contains(global.map[x][y], color) {
		array_push(global.map[x][y].overlays, color);
	}
	return true;
}