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PHP Code:

function onCreated()
 setTimer(0.05);
function onTimeOut() {
 if (player.hearts < 0.5) {
  setlevel2("hospital.nw",30,30);  //syntax: setlevel2(LevelNameInString,x,y);
 }
} 


That should work without much lag. If there is lag, then use this:

PHP Code:

function onPlayerDies() {  //I don't know if this is a real command, but Codein said there was one.
 setlevel2("hospital.nw",30,30);  //syntax: setlevel2(LevelNameInString,x,y);
}