Use the makePicture function to create a picture in JES. You can use the show function to display the image to check to make sure it works.

The getPixels(a_picture) function returns a collection of all of the pixels in an image. You can use this function, as well as a for loop to examine and modify each pixel in an image.

The getRed, getGreen, and getBlue functions will give you the current color of a pixel.

The setRed, setGreen, and setBlue functions will let you set the color of a pixel.

In order to brighen the image, you want to increase all of the color values for each pixel by the same fixed amount.