[Pablo Borsellino]

Please read some Tutorials
For the Objekt "Checker", create a new bolean with an array for every player. In the Command, you make "if(booleanname==false) >> CreateObject and booleanname=true; else if(booleanname==true) >> You cant create an Object". And on the Destroy Command "if(booleanname==true) >> DestroyObject and booleanname=false; else if(booleanname==false) >> SendClientMessage(player,0xAFAFAFFF,"You have allready an Object created!");