Scratch

http://joren.tk/blocks/pluginlab.htm
Or if the link doesn't work read below

when I receive [game: jump v]
set [jump? v] to (1)
change y by (2)
set [v speed v] to (5)

when [up arrow v] key pressed
if <(jump?) = (0)>
  broadcast [game: jump]
end

when I receive [game: start v]
repeat until <not <(screen) = (screen)>> 
  change y by (v speed)
  if <not <touching [ground v]?>>
    change [v speed v] by (-0.25)
  else
    change y by (((v speed) + (1)) * (-1))
    set [v speed v] to (0)
    set [jump? v] to (0)
    wait until <<not <touching [ground v]?>> or <(jump?) = (1)>>
  end
end

when I receive [game: start v]
set [ghost v] effect to (100)
repeat until <not <(screen) = (screen)>> 
  set x to ( [x position v] of [sensor2 v] )
end

when I receive [game: jump v]
set [jump? v] to (1)
change y by (2)
set [v speed v] to (5)

when [up arrow v] key pressed
if <(jump?) = (0)>
  broadcast [game: jump]
end

when I receive [game: start v]
repeat until <not <(screen) = (screen)>> 
  change y by (v speed)
  if <not <touching [ground v]?>>
    change [v speed v] by (-0.25)
  else
    change y by (((v speed) + (1)) * (-1))
    set [v speed v] to (0)
    set [jump? v] to (0)
    wait until <<not <touching [ground v]?>> or <(jump?) = (1)>>
  end
end

when I receive [game: start v]
set [ghost v] effect to (100)
repeat until <not <(screen) = (screen)>> 
  set x to ( [x position v] of [sensor2 v] )
end

Then at the bottom it says in hyperlink blue: parse script!

I got the link from another post. It's a closed topic though.

My question is: What...does...this...mean?