Decorate code for a simple jetpack

actor JetPackItem : Inventory 60000
{
+inventory.fancypickupsound
+invbar
+inventory.keepdepleted
+inventory.alwaysrespawn
+inventory.persistentpower
Inventory.PickupSound "jetpack/gotit"
Inventory.UseSound "jetpack/on"
DeathSound "jetpack/off"
Inventory.PickupMessage "You got the jetpack!"
Inventory.Icon "JETSA0"
Inventory.MaxAmount 1
Inventory.Amount 1
States
 {
 Spawn:
 JETS A -1
 stop
 Pickup:
 TNT1 A 0 A_GiveInventory("JetPack",20)
 TNT1 A 0 A_JumpIf(CheckInventory("JetPackOn",1) & GetPlayerInput(-1,BT_USE),"TurnOff")
 TNT1 A 0 A_JumpIf(CheckInventory("JetPackOn",0) & GetPlayerInput(-1,BT_USE),"TurnOn")
 TNT1 A 0 A_JumpIfInventory("JetPackFuel",0,"TurnOff")
 loop
 Use:
 TNT1 A 0 A_JumpIf(CheckInventory("JetPackOn",0) & GetPlayerInput(-1,BT_USE),"TurnOn")
 TNT1 A 0 A_JumpIf(CheckInventory("JetPackOn",1) & GetPlayerInput(-1,BT_USE),"TurnOff")
 TNT1 A 0 A_JumpIfInventory("JetPackOn",0,"Fail")
 TNT1 A 0 A_LowGravity
 TNT1 A 0 ThrustThingZ(PlayerNumber(),20,0,0)
 TNT1 A 0 ThrustThing(GetActorAngle(PlayerNumber()),20,100,0)
 TNT1 A 0 A_TakeInventory("JetPackFuel",1)
 loop
 TurnOn:
 TNT1 A 0 A_GiveInventory("JetPackOn",1)
 goto Use
 TurnOff:
 TNT1 A 0 A_TakeInventory("JetPackOn",1)
 Goto Use
 Fail:
 TNT1 A 0 A_JumpIf(CheckInventory("JetPackOn",0) & GetPlayerInput(-1,BT_USE),"TurnOn")
 TNT1 A 0 A_JumpIfInventory("JetPackOn",1,"Use")
 TNT1 A 0 A_LowGravity
 stop
 }
}

actor JetPackFuel:Inventory
{
inventory.Invbar
Inventory.Icon "FUELA0"
Inventory.MaxAmount 20
States
 {
  Spawn:
  FUEL A -1
  stop
 }
}