Infrared Sensor system

So I have this idea to build a type of fire sensor. I got it from a friend at school, he said that it was too hard, im gonna give it a shot. I will attach a rough diagram to this text. I will be using cheap sensors, and small candles. I know that the sensors do in some way pick up the flame, but the picture I have attached is not my own. It does however point out the values that the fire changes. I have accepted that under 100 of these values is close or 'critical' fire. This will be a small model, but enough to get the idea across. The idea being that if any 2 sensors pick up those specific values under 100, it should give me some kind of warning. If I should go into any further detail, or name each sensor on the diagram, then I would be perfectly happy to do so. The part number of the sensors I am using are the BPT-BP0914, since part number seemed to be the most detailed name I could get. It says the 'code' of these sensors are 14C0633. I have started with the coding abit, and have an Arduino Mega and Uno, as well as loads of extras, so those wont be a problem. The coding I need help with was mentioned above, my problem simply being I am not sure how to program the arduino to get it to give me a warning if there is a infrared source detected by atleast 2 sensors. If you want to view the sensors, they are these BPT-BP0914 - IR PHOTOTRANSISTOR sesnor 5mm BL 940n RX
I am not sure if that is clickable, please inform me how to do it correctly if it isnt, I am still a beginner here.

Fire Sensor layout Downsaved.pdf (473 KB)

I know that the sensors do in some way pick up the flame

They pick up light. Nothing more. They can not distinguish between LEDs and fire. Or sunlight or any other form of light.

They are NOT suitable for sensing fire.