Expected "else", etc. but found "on".

Question

I'm trying to make an app in Applescript, and then this happened:
display dialog "What version of Minecraft do you have?" buttons {"-1.5", "1.6+", "Cancel"} with icon note
if the button returned of the result is "-1.5" then
display dialog "Opening the game in 3" buttons {"Cancel"} default button 1 with icon note giving up after 1
display dialog "Opening the game in 2" buttons {"Cancel"} default button 1 with icon note giving up after 1
display dialog "Opening the game in 1" buttons {"Cancel"} default button 1 with icon note giving up after 1
          try
  -- Below is very scary, but actually is just debugging the code
                    set MineLog to do shell script "cd ~/Library/Application\\ Support/minecraft/bin; java -Xms512M -Xmx1024M -Xincgc -cp \"minecraft.jar:jinput.jar:lwjgl.jar:lwjgl_util.jar\" -Dorg.lwjgl.librarypath=\"$(pwd)/natives\" -Dnet.java.games.input.librarypath=\"$(pwd)/natives\" net.minecraft.client.Minecraft"
  -- Above is very scary, but actually is just debugging the code
                    my write_mine_log(the MineLog)
          end try
error>      on write_mine_log(this_minelog)
          set the mining_log to ((path to desktop) as text) & "MineLog.txt"
          try
                    open for access file the mining_log with write permission
                    write (this_minelog & return) to file the mining_log starting at eof
                    close access file the mining_log
          on error
                    try
                              close access file the mining_log
                    end try
          end try
another error> end write_mine_log
else if the button returned of the result is "1.6+" then
-- action for 2nd button goes here
else
-- action for quit button goes here
end if
how to fix>

Answer 1

Now I get another error:
                   error VV                                error VV
set MineLog to (tell application "Terminal" to do script "cd ~/Library/Application\\ Support/minecraft/bin; java -Xms512M -Xmx1024M -Xincgc -cp \"minecraft.jar:jinput.jar:lwjgl.jar:lwjgl_util.jar\" -Dorg.lwjgl.librarypath=\"$(pwd)/natives\" -Dnet.java.games.input.librarypath=\"$(pwd)/natives\" net.minecraft.client.Minecraft")
Expected expression, “)”, etc. but found “tell”.
and
A to:do can’t go after this application Terminal.
fix?