Mana Shield Script

[Raeiphon]

PHP Code:

// NPC made by Sephir Scarrend
//Mana Absorpotion Shield
//#CLIENTSIDE
if (created) {
  this.state=0;
}
if (playertouchsme) {
  toweapons Mana Shield;
}
if (weaponfired) {
  if (strtofloat(#s(clientr.player_mp))>0) {
    this.on=1;
  } else {
    setplayerprop #c, Not enough MP!;
  }
  timeout=.05;
  setimg light2.png;
  this.hearts=playerhearts;
  this.state=0;
}

if (timeout) {
  if (this.on==1) {
    timeout=.05;
    if(playerhearts!=this.hearts){
      playerhearts=this.hearts;
      freezeplayer 0;
    }
    showimg 1,light2.png,playerx-2.5,playery-2.5;
    changeimgcolors 1,1,1,1,0.9;
    this.state=(this.state+1)%12;
    changeimgzoom 1,1-.08*this.state;
    drawaslight;
    this.mp = strtofloat(#s(clientr.player_mp))-.01; //MP drain while shield is active
    setstring clientr.player_mp,#v(this.mp);
    if (strtofloat(#s(clientr.player_mp))<0) {
      this.on=0;
      hideimg 1;
      setimg door.gif;
      dontblock;
      this.mp = 0;
      setstring clientr.player_mp,this.mp;
    }
  }
}
if (playerhurt) {
  if (this.on==1) {
    this.mp = strtofloat(#s(clientr.player_mp))-.35; //MP lost when hurt normally (damage absorption)
    setstring clientr.player_mp,#v(this.mp)
      }
}
//below lines allow for disabling the shield
if(keypressed){
  if(keydown(6)){
    if(strequals(Mana Shield,#w)){
      if(this.on==1){
        this.on=0;
        setimg door.gif;
        hideimg 1;
        dontblock;
      }
    }
  }
} 


I have that, it works, perfectly, it's my first light script ever and my first try of doing any script without help.

I'm asking for criticism and what I can improve with this (nothing too complex please, or actually explain it to me..). If you want to use this on your server or anything, please let me know