The Gate
Starting with the first stage which is the gate, We will divide it into 3 sections.
1️⃣ Components : • buzzer
                                      • servo motor
                                    • lcd (16 x 2)
                                         • keypad (4 x 4)
                                      • arduino uno
                                                                 • RGB LED 12V (8 pcs or more)
                                                        • 2 channel relay module

2️⃣ Code :        

3️⃣ Schematic :

The Fire & Gas Safety
As we follows with the second stage, we will follow the same steps.
1️⃣ Components : • buzzer
                                       • flame sensor
                                             • MQ2 gas sensor
                                                                • DHT11 (temperature sensor)
                                   • NodeMCU

2️⃣ Code :        

3️⃣ Schematic :

The Lighting
Not too much to talk about, a light system depends on surrounding lighting.
1️⃣ Components : • LDR sensor
                               • arduino uno
                   • LEDS
                                                             • fan (not from system -> bonus)

2️⃣ Code :        

3️⃣ Schematic :