I need help with a skript

[NoPulp]

Can anyone make a skript where there is one person who is randomly picked to be chosen. This Chosen person has a golden helmet that is stuck on there head and is unbreakable, when the chosen person punches someone they become chosen and the original chosen one isn't chosen anymore(golden hat carry's over to new chosen person). (Im basically explaining tag here) If you can, make it so that there is a command to start the game and stop it, when u start the game it should tp everyone to certain cords, and turn everyone into game mode survival. And once someone wins it should say it in chat and give them a diamond. (make it so everyone has regeneration and saturation throughout the entire game) Thank you for reading this all and if u can help pls help me, Thanks!