Raspberry Pi Zero program

I need a program written for a raspberry pi zero, that will be plugged into a TV via HDMI output. I want the Pi to output a picture to the TV, in JPEG or PNG format, then when the PI receives a signal, it dissolves the image to show a new image, which will be a logo. Then after about 5 seconds it changes back to the original picture. The signal the PI will be watching for is a drop in voltage, from 12 volts to 0 volts momentarily across 2 wires that I can input into the PI. I would like the ability to change the static picture out, but the logo picture will remain the same. This is for a Samsung Frame TV that is on a door displaying art. When the door is opened with a RFID card, it releases the door lock (this is the drop in voltage from 12 to 0) and I want the logo picture to display on the TV for 5 seconds. Is this possible?