Here is the problem?

trainers = {""}

groupid = 947529
game.Players.PlayerAdded:connect(function(player)
	if player:GetRankInGroup(groupid) >= 9 then
		trainers[#trainers+1] = player.Name
	end
	for i=1,#trainers do
		if trainers[i]==player.Name then
		player.Chatted:connect(onDoorSpeak)
		break
		end
	end
end)



function checkEnv()
yes = false
	for _,v in pairs(workspace:GetChildren()) do
		if v:FindFirstChild("Environment") then
		yes = true
		end
	end
return yes
end



function onDoorSpeak(msg,recip) 

keywords = { 
	sample = {"computer","end","start","sft","abominable","awards","randomteams","resetteams","hillyholes"};
}

keyvals = { 
	["computer"]				= false; 
	["end"]						= false;
	["start"]					= false;
	["sft"] 					= false;
	["abominable"]				= false;
	["awards"]					= false;
	["randomteams"]				= false;
	["resetteams"]				= false;
	["hillyholes"]						= false;
}

	for _,v in pairs(keywords) do 
		for i = 1,#v do
		s,e=string.lower(msg):find(v[i])
			if s ~= nil and e ~= nil then
				if s == e-(v[i]:len()-1) then
				keyvals[v[i]]=true
				end
			end
		end
	end
	wait()
	if keyvals["computer"] then 
		msg = Instance.new("Message",game.Workspace)
		if keyvals["start"] then 
			if keyvals["sft"] then 
				if not checkEnv() then 
					clone = game.Lighting.Simulations.SFT:Clone()
					clone.Parent = game.Workspace
					clone.Name = "Environment"
					msg.Text = "SFT loaded."
					wait(1)
					msg:Destroy()
				end
			
			elseif keyvals["abominable"] then
				if not checkEnv() then 
					clone1 = game.Lighting.Simulations.Abominable:Clone()
					clone1.Parent = game.Workspace
					clone1.Name = "Environment"
					msg.Text = "Abominable loaded."
					wait(1)
					msg:Destroy()
				end	
				
			elseif keyvals["awards"] then
				if not checkEnv() then 
					clone2 = game.Lighting.Simulations.Awards:Clone()
					clone2.Parent = game.Workspace
					clone2.Name = "Environment"
					msg.Text = "Awards loaded."
					wait(1)
					msg:Destroy()
				end		
			
			
			elseif keyvals["hillyholes"] then
				if not checkEnv() then 
					clone3 = game.Lighting.Simulations.HillyHoles:Clone()
					clone3.Parent = game.Workspace
					clone3.Name = "Environment"
					msg.Text = "Hilly Holes loaded."
					wait(1)
					msg:Destroy()
				end	
				
		
			end
		elseif keyvals["end"] then
			if game.Workspace.Environment ~= nil then
				game.Workspace.Environment:Destroy()
				msg.Text = "Current sim removed."
				wait(1)
				msg:Destroy()
			end
		elseif keyvals["randomteams"] then
			msg.Text = "Randomizing teams..."
			a = game.Players:GetChildren()
			blueteam = 0
			greenteam = 0
				for i,v in pairs(a) do --start for loop
					if v.TeamColor == BrickColor.new("Bright yellow") or BrickColor.new("Bright violet") then
						if blueteam >= greenteam then --check for unbalanced teams
							v.TeamColor = BrickColor.new("Really blue")
							blueteam = blueteam + 1
						elseif greenteam > blueteam then --check for unbalanced teams
							v.TeamColor = BrickColor.new("Lime green")
							greenteam = greenteam + 1
						end --end if teams are unbalanced
					elseif v.TeamColor == BrickColor.new("Really blue") then --check for blue players
						blueteam = blueteam + 1
					elseif b.TeamColor == BrickColor.new("Lime green") then --check for green players
						greenteam = greenteam + 1
					end
				end --end for loop
				wait(1)
				msg:Destroy()
		elseif keyvals["resetteams"] then
			msg.Text = "Resetting teams..."
			a = game.Players:GetChildren()
				for i,v in pairs(a) do
					if v.TeamColor == BrickColor.new("Really blue") or BrickColor.new("Lime green") then
						if v:GetRankInGroup(groupid) >= 9 then
							v.TeamColor = BrickColor.new("Really red")
						elseif v:GetRankInGroup(groupid) < 9 then
							v.TeamColor = BrickColor.new("New Yeller")
						end
					end
				end
			wait(1)
			msg:Destroy()
			end
		end
	end