number_steps = dir_i * distance_to_center + dir_progress
left_arm = correct_arm(-(step_size/2) - step_size*number_steps)
right_arm = correct_arm(left_arm - step_size)
number_steps = dir_i * distance_to_center + dir_progress
left_arm = correct_arm(-(step_size/2) - step_size*number_steps)
right_arm = correct_arm(left_arm - step_size)