ROTATEEFFECT only works once with each sprite number. Also the rotation number is in radians.
To show the rotation you need to script it. You can manipulate sprites by using findImg( <sprite number>).
PHP Code:
GANI0001
SPRITE 1 PARAM1 0 0 32 32 Param1
SINGLEDIRECTION
ANI
1 -8 -8
ANIEND
SCRIPT
function onPlayerEnter()
{
for ( findImg(1).rotation = 0; findImg( 1).rotation < ( 2 * pi); findImg( 1).rotation += ( pi / 8);)
sleep( 0.05);
}
SCRIPTEND