Need help to create a crack phase before its termination

Hi guys,
i have implemented a code for destroy the box after collision as seen below.

But i need to put another crack phase before the termination of box.

In new scenario;
Firstly, the object hits the vaulting box. Box and the object cracks. (That’s what i can’t implement as a new cracked version of box or object.)
Secondly, when The cracked box or object takes another hit. It should be destroyed.

I need your directions to make this happen. Can anyone help? Thanks in advance.

local onVaultingboxPostCollision = function( self, event )  
 if event.force \> 1.5 and self.isHit == false then  
 audio.play( monsterPoofSound )  
  
 self.isHit = true  
 print( "Box destroyed! Force: " .. event.force )  
 self.isVisible = false  
 self.isBodyActive = false  
  
 -- Poof code below --  
 if poofTween then transition.cancel( poofTween ); end  
  
 greenPoof.x = self.x; greenPoof.y = self.y  
 greenPoof.alpha = 0  
 greenPoof.isVisible = true  
  
 local fadePoof = function()  
 transition.to( greenPoof, { time=500, alpha=0 } )   
 end  
 poofTween = transition.to( greenPoof, { time=50, alpha=1.0, onComplete=fadePoof } )  
  
  
  
 self.parent:remove( self )  
 self = nil  
  
 local newScore = gameScore + mCeil(5000 \* event.force)  
 setScore( newScore )  
 end  
 end  
--Vaulting Box 2  
 local vaultingbox2 = display.newImageRect( "vaultingbox2.png", 55, 45)  
 vaultingbox2.x = 613.5; vaultingbox2.y = 224.5  
 vaultingbox2.xScale = 1  
 vaultingbox2.yScale = 1  
 vaultingbox2.myName = "wood"  
  
 vaultingbox2.isHit = false  
  
 vaultingbox2.postCollision = onVaultingboxPostCollision  
 vaultingbox2:addEventListener( "postCollision", vaultingbox2 )  
  
 physics.addBody( vaultingbox2, "dynamic", {density = woodDensity, bounce = 0.2, friction = 0.3, shape=vaultingbox2Shape} )  
 levelGroup:insert( vaultingbox2 )  

[import]uid: 34788 topic_id: 9630 reply_id: 309630[/import]

I just need your help. Just give me a couple of clue or direction. I will be very appreciated for any kind of help. Thanks. [import]uid: 34788 topic_id: 9630 reply_id: 35239[/import]