Fill in the yellow sprites with three words that have a long vowel sound and three words that have a short vowel sound. Change the programming for each sprite so that it senses the correct color to match its vowel sound and spelling; magenta for long vowels and orange for short vowels.
The eyedropper feature of the color sensing script can sometimes be feisty. If you try to click on anything on the stage it will register as black. If you want a color that is on the stage, sample that color from the thumbnail of the stage in the bottom left corner.