I need an expert in arduino

I have an arduino project for my university project. I want you to write me the code as i am not so expert in coding. The project is too simple. The scenario is: This is an automatic weight sand filler. I have a relay which open a gate and close the gate of the sand. I have a weight scale. I will enter a box on the scale. The box is weight 1 kg. I want to enter 2 kg of sand in the box. I enter a limit on arduino of 3kg. I click the start button and the gate is open when the weight reach the limit of 3kg the gate close instantly. Hardware : I connect to my arduino hx711 which is connected with load cell. I connect LCD (LCM1602) to be able to enter the limit and watching live the exact weight of the scale during the filling. As buttons I bought a keypad for arduino which had 16 characters (1,2,3,4,5,6,7,8,9,0, *, #, A, B, C, D). And a relay. A: 1000 grams limit B: 2000 grams limit C: 3000 grams limit D: 4000 grams limit * = stop button/change the limit manually by entering your own limit eg. 2512 grams # = start button The weight is in grams so no "," is needed. Please ask me anything else that you want. I need the code as soon as possible. Thank you