help with onwall

[IAMNOTAFREAK]

NPC Code:

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if (created) {toweapons walking;}

if (playerenters){this.m=.1;this.oldx = playerx;this.oldy = playery;}

if (isweapon||timeout){this.mx=0;this.my=0;this.ok=1;

  this.dir=10*this.my+this.mx;this.rx=1;this.ry=1;

  if (playerx<this.oldx) {this.mx=this.m;}

  if (playery<this.oldy) {this.my=this.m;}

  if (playerx>this.oldx) {this.mx=-1*this.m;}

  if (playery>this.oldy) {this.my=-1*this.m;}

  if (this.mx<0) {this.rx=4-1;}

  if (this.mx>0) {this.rx=-1.5-1;}

  for (i=1;i<=2;i+=.25; ) {this.rx+=.25;

    for (this.ry=1;this.ry<=2.5;this.ry+=.5) {

      if (onwall(playerx+this.rx+this.mx,playery+this.ry)) {this.ok=0;}}}

  if (this.ok==1) {playerx-=this.mx;}

  if (this.my<0) {this.ry=4.5-1.5;}

  if (this.my>0) {this.ry=-1-1.5;}

  for (i=1;i<=3;i+=.25; ) {this.ry+=.25;

    for (this.rx=.75;this.rx<=2.5;this.rx+=.5) {

      if (onwall(playerx+this.rx,playery+this.ry+this.my)) {this.ok=0;}}}

  if (this.ok==1) {playery-=this.my;}

  this.oldx = playerx;

  this.oldy = playery;

  timeout=.05;

}

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the scripts works fine, i just need some help with the onwall for playerdir 1 (to the left)