Robot project: Arduino - Nextion display - Servo motors

Function: For boxing sparring. See: [login to view URL] I want to make something like that. This robot consists of 4 DSServo RDS3235 servo motors all servo motors are connected directly to Arduino nano. Motors will act as arms, and will try to hit opponent. Everything should be powered from a 7.5V ac/dc power adaptor. Movements: Arms should move randomly, with random intervals between movements. Minimum and maximum interval will be pre-set. Upper hands movements: should go from 90 degrees -> 200 degrees. Up to down. Lower hands movements: should go from 0 degrees -> 110 degrees. Side to mid. In short, hand movements: 110 degrees. How to control: Robot will have a 3.5” Nextion HMI Touch Display: Level (1-5) can be chosen. Rounds can be chosen. (Max12 rounds). Remaining time of round can be seen. Resting time can be set. Levels: 1: 30% speed 2: 45% speed 3: 65% speed 4: 80% speed 5: 100% speed I already have a prototype working just fine. But I need to add some features(Attachment: Robot project v2). Right now, robot is using 4x LDX-227 servo motors connected to a servo controller which is connected to Arduino Nano. Project: I want to change those servos to this type: 4x RDS3235 servos which will be connected directly to the Arduino nano. Robot will have 2 modes: Spar mode and Practice mode. Spar mode: Random movements with 5 levels. Practice mode: Preset combinations and ability to create your own combinations. Settings for fighting will include: Number of rounds, Round length and Level. Bid only if you are familiar with Nextion display coding, Arduino and Servo motors. This is my working model: [login to view URL]