In my system, you can have up to 3 players total in a party. If you had from 1 to 3 people in a party, how exactly would you check to see how many you have, and how would I teleport them to the battlefield at a specified position?

For example:

//////////////////
// //
// //
// aaaaaaaaaa //
// aXaaaaaaBa //
// aaXaaaaBaa //
// aXaaaaaaBa //
// aaaaaaaaaa //
// //
// //
//////////////////

The X's would represent the enemy, where as the B's would represent the players.