plane damage if gear not deployed

integer gear;

default
{
state_entry()
{
llListen(0,"",llGetOwner,"");
gear;
}
listen(integer channel, string name, key id, string message)
{
if(message="g"
{
!gear;
}
else if((message="g") && (!gear)) //error
{
gear;
}
}
}
CODE


that is how far i got, im not sure how to tie it all into a collision script or how to get passed that error anyone have any ideas?

 //-- in globals
 integer vgBooGearDown = TRUE; //-- because it'll probably rez this way right?
 
 //-- in whatever code you have to lower/raise  the landing gear
 vgBooGearDown = !vgBooGearDown;
 
 
 //-- in the collision_start event
 if (!vgBooGearDown){
  //--damage code/error code
 }