Help with custom functions

[Nissandrifter]

I made these for use in my skin selection screen but they dont work properly. I cant see anything wrong so can someone please help me

  
function getNextSkin( player ) 
   repeat 
      ID = ID + 1 
   until (ID > 6) and (ID ~=  and (ID ~= 42) and (ID ~= 65) and (ID ~= 74) and (ID ~= 86) and (ID ~= 119) and (ID ~= 149) and (ID ~= 208) and (ID < 265) 
   setPlayerSkin (player, ID ) 
end 
  
function getPreviousSkin( player ) 
   repeat 
      ID = ID - 1 
   until (ID > 6) and (ID ~=  and (ID ~= 42) and (ID ~= 65) and (ID ~= 74) and (ID ~= 86) and (ID ~= 119) and (ID ~= 149) and (ID ~= 208) and (ID < 265) 
   setPlayerSkin (player, ID ) 
end 

[Nissandrifter]

Anyone know why its not working ?

[eAi]

We aren't compilers. Tell us what doesn't work. Any errors in debugscript?