grenade explodes(player,x,y){
for each player{
	if math.sqrt(player.x-explosion.x^2+player.y-explosion.y^2) < radius R then{
	playersprite[id] = true
	timer(T,updatefire(id))	
}
}
}
}
updatefire(id){
	effect(flare,255,0,0,player[id].x,player[id].y) < from 
cs2d sprite
	
	 effects or something like that
         (add some orange too)
	(for added effect add smoke effect as well)
 	player[id].health -= 1
}