I'd like to trigger a sprite animation when it is touched, and only have it loop once.

I have a sprite animation that currently triggers on screen touch, but I don't know how to make it so it only animates when the sprite itself is touched.

```
require "sprite"

local sheet1 = sprite.newSpriteSheet( "greenman.png", 75, 105 )

local spriteSet1 = sprite.newSpriteSet(sheet1, 1, 16)

sprite.add( spriteSet1, "green", 1, 12, 700, 1 ) -- play 12 frames every 700 ms
local instance1 = sprite.newSprite( spriteSet1 )
instance1.x = display.contentWidth/2
instance1.y = display.contentHeight/2.8

function kick( event )
  if(event.phase == "ended") then
    instance1:prepare("green")
    instance1:play()
  end
end

Runtime:addEventListener("touch", kick)

```