One of the most common transitions in movies is fade to black. Let’s implement that. Take a picture as input and copy that into the first frame of the movie. For the next 5 frames, copy the picture but make every 10th pixel black. Then for the next 5 frames, make every 9th and 10th pixel black. Continue the process until all the pixels are black.

Question

What will be an ideal response?

Answer 1

```
def fadeToBlack(directory, picture):
#if each frame has 10 pixels changed, max frame is width/10
width = getWidth(picture)
height = getHeight(picture)
for num in range (1 ,10):
canvas = makeEmptyPicture (width,height)
copy(pic, canvas, 0, 0)
val = 10-num+1
makeBlack(canvas, val)
numStr=str(num)
if num < 10:
writePictureTo ( canvas , directory +"//frame0"+ numStr +".jpg")
elif num >= 10:
writePictureTo ( canvas , directory +"//frame"+ numStr +".jpg")
movie = makeMovieFromInitialFile(directory+"/frame00.jpg");
return movie

def makeBlack(picture, val):
pixels = getPixels(picture)
for increase in range(val, 11):
for pixelIndex in range(0, len(pixels), increase):
setColor(pixels[pixelIndex], makeColor(0,0,0))
```