Hello,
I have done the similar like project before (As per the movements of Robotic Arm recommend by Client).
Here are the main components that you required in this project.
-> Arduino Uno
-> Servo Motor (SG 90- four pieces)
-> Power Supply (5v- preferably two)
-> Jumper wires ( to make connections easily)
-> plastic or any other Material with you want to make body of Robotic ARM
I will provide you codes and Connection Diagram.
I can also come teamviewer to upload the codes in your hardware via screenshare (as i do with my all client to help them).
You can message me any time as i am available all time as i am full time freelancer.
Thanks,
Chanchal