ok so this need to be a program that take to pictures ( that are the same size ) and slowly fades the two into a newPic. this is what i have so far, but i am having major issues. I am totally new with programming and we are using JES.

def main():
  showInformation( "Pick two pictures of the same size." )
  pic1= makePicture( pickAFile() )
  pic2= makePicture( pickAFile() )
  
  w=getWidth( pic1 )
  h=getHeight( pic1 )
  assert w == getWidth( pic2 )
  assert h == getHeight( pic2 )
  newPic= makeEmptyPicture( w,h )
  
  printNow( "working..." )
  for x in range (0,w) :
    for y in range (0,w) :
    
      totalRed= 0
      totalGreen= 0 
      totalBlue=0
      mixingLevels= x /(float(w-1)) # I totally mess things up here
      int( mixingLevels*
      for mixingLevels in range( 0, w-1 ):
        px= getPixel( pic1, 1-mixingLevels, y)
        totalRed= totalRed + getRed( px ) 
        totalGreen= totalGreen + getGreen( px )
        totalBlue= totalBlue + getBlue( px )
        
      avgRed= totalRed / (w - 1)
      avgGreen= totalGreen / (w - 1)
      avgBlue= totalBlue / (w - 1)
      
      #px1= getPixel( pic1, x, y )
      #px2= getPixel( pic2, x, y )
      pxNew= getPixel( newPic, x, y )
      setRed( pxNew, avgRed )
      setBlue( pxNew, avgBlue )
      setGreen( pxNew, avgGreen )
      
  printNow( "...done" )
  show( newPic )
      

I think that i need to use a function called crossfade. here is a bit more info about the program, mixingLevel= x/ float(w-1) and int( mixingLevel*r2 + (1-mixingLevel) * r1) where r1 and r2 and the red levels from both picture.

please please please help!!!