added not for SSTV image test

update

@@ -49,17 +49,13 @@ else
 fi
 
 FILE=/home/pi/CubeSatSim/sstv_image_1_320_x_256.jpg
-if [ -f "$FILE" ]; then
+if [ ! -f "$FILE" ]; then
-  ;
-else 
     echo "Copying SSTV image 1"
     cp /home/pi/CubeSatSim/sstv/sstv_image_1_320_x_256.jpg /home/pi/CubeSatSim/sstv_image_1_320_x_256.jpg
 fi
     
 FILE=/home/pi/CubeSatSim/sstv_image_2_320_x_256.jpg
-if [ -f "$FILE" ]; then
+if [ ! -f "$FILE" ]; then
-  ;
-else 
     echo "Copying SSTV image 2"
     cp /home/pi/CubeSatSim/sstv/sstv_image_2_320_x_256.jpg /home/pi/CubeSatSim/sstv_image_2_320_x_256.jpg
 fi