lua - Why does my while code cause my simulator to crash? -

whenever add while code game, simulator stops responding. know while code causes problem because if take while code out, game works supposed to. whats wrong while code, , how fix it? let me know if need more information solve problem. here code:

function scene:createscene ( event ) local group = self.view  local tap = display.newtext("tap:", 0, 0, "helvetica", 36) tap.x = 100 tap.y = screentop + 20 group:insert(tap)  local imagefiles = {"redbox.png", "bluebox.png"} local imagefile = imagefiles[math.random(2)] local randomimage = display.newimage(imagefile, centerx, screentop + 20)   local button1 = display.newimage("redbox.png") button1.x = centerx button1.y = centery group:insert(button1)  local button2 = display.newimage("bluebox.png") button2.x = centerx button2.y = centery - 100 group:insert(button2)  local function endgame(event) if imagefile == "redbox.png" button1.x = math.random( 55, 300) button1.y = math.random( 55, 300) button2.x = math.random( 55, 300) button2.y = math.random( 55, 300) local imagefile = imagefiles[math.random(2)] local randomimage = display.newimage(imagefile, centerx, screentop + 20) while imagefile == "redbox.png" if imagefile ~= "redbox.png" storyboard.gotoscene( "restarteasy" )  end end end end  local function endgame2(event) if imagefile == "bluebox.png" button1.x = math.random( 55, 300) button1.y = math.random( 55, 300) button2.x = math.random( 55, 300) button2.y = math.random( 55, 300) local imagefile = imagefiles[math.random(2)] local randomimage = display.newimage(imagefile, centerx, screentop + 20) while imagefile == "bluebox.png" if imagefile ~= "bluebox.png" storyboard.gotoscene("restarteasy")  end end end end  button1:addeventlistener("tap", endgame) button2:addeventlistener("tap", endgame2)  end 

i dont know why using while , if statement unnecessarily, try should work.

 local function endgame(event)   if imagefile == "redbox.png"    button1.x = math.random( 55, 300)    button1.y = math.random( 55, 300)    button2.x = math.random( 55, 300)    button2.y = math.random( 55, 300)    local imagefile = imagefiles[math.random(2)]    local randomimage = display.newimage(imagefile, centerx, screentop + 20)     else     storyboard.gotoscene( "restarteasy" )   end end