Control customers who are in line to pay for their items to the counter
Be careful to those who want to go to the counter without queuing
Be careful with your shopping cart so that it does not hit the others and everything you have bought so far will fall to the ground.
Do not delay customers too much in line to get them angry
You can carefully reach the counter by holding your finger on the screen
Complete the queue each time to attract more customers
According to the color of each customer's T-shirt, send it to the counter with the color of their flag
Pay attention to those who are not in the queue