If you cant see it it cant be there...

[theHAWKER]

If you cant see it it cant be there, at least thats what it looks like...

I'm trying to make a hole in the ground, BUT your not sapost to go down from the top, so to stop people from going down there i put an invisable block, but it wont work.
this is my script for the block:

PHP Code:

// NPC made by theHAWKER is a
if (created) {y-=.01;
drawaslight;
}
//#CLIENTSIDE
if (playerenters) {
  setcoloreffect 1,1,1,0.01;
} 


can someone help me out?