maze navigation and line following robot

the robot must be built with the following parts, 1. stm32l476vg discovery board 2. pololu 1207 stepper motor( only 2 motor) 3. HC 04 ultrasonic sensors 4. pololu 2459 reflectance sensor robot must be within 8"x8" size. the robot will do the following: maze navigation: The walls of the maze will be made out of 2 by 4s. • The walls will be placed no less than one foot apart. any maze solving algorithm will suffice. Line Following: follow black line drawn on a white surface. The line will be between half and one inch wide. any line maze solving algorithm will suffice. the project needs to be done in 3 days. after finishing the project, you have to show me demonstration video so that i can be sure. I will need the code and procedure how to assemble . i will assemble the robot in my place.