Figure 1: Start off by making this kind of Powerpoint object, containing the stroop test words
Figure 2: Change the background-color to your preference (The DEMO is set to black)
Figure 3: Also change the object-color to your preference (The DEMO is set to black)
Figure 4: Right mouse click on the side of the object and select "Save as Picture..."
Figure 5: Change the extension of the new picture to JPEG
Figure 6: Change the destination folder and the name of the new picture. Make sure you name the file according to the Animation Files (Example: "strp0001.jpg"
Figure 7: See here the end-result!