[GUI Triggers] Game modes

[Golden-Drake]

Can anyone give me a link or a quick guilde on how to make the initial trigger for a game mode (like in DotA or Castle fight you type "-" followed by for example "ap" or "ar")
i need to compare parts of an entered string?

(i think its something about substrings but i'm not sure how it works)

could i use this for a tutorial?

NVM. i think i found out!

trigger

• Modes
  • Events
    • Player - Player 1 (Red) types a chat message containing - as A substring
  • Conditions
  • Actions
    • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
      • If - Conditions
        • Or - Any (Conditions) are true
          • Conditions
            • (Substring((Entered chat string), 2, 3)) Equal to ig
            • (Substring((Entered chat string), 4, 5)) Equal to ig
            • (Substring((Entered chat string), 6, 7)) Equal to ig
      • Then - Actions
        • Set Damage = 100.00
        • Game - Display to (All players) the text: Instagib |cff00ff00...
      • Else - Actions
    • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
      • If - Conditions
        • Or - Any (Conditions) are true
          • Conditions
            • (Substring((Entered chat string), 2, 3)) Equal to sr
            • (Substring((Entered chat string), 4, 5)) Equal to sr
            • (Substring((Entered chat string), 6, 7)) Equal to sr
      • Then - Actions
        • Game - Display to (All players) the text: Speed-regeneration ...
        • Set Regeneration = 2.00
      • Else - Actions
    • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
      • If - Conditions
        • Or - Any (Conditions) are true
          • Conditions
            • (Substring((Entered chat string), 2, 3)) Equal to fb
            • (Substring((Entered chat string), 4, 5)) Equal to fb
            • (Substring((Entered chat string), 6, 7)) Equal to fb
      • Then - Actions
        • Game - Display to (All players) the text: Fast Bolts |cff00ff...
        • Set Speed = 1000.00
        • Set Speed = (Speed / 20.00)
      • Else - Actions

This works as intended