Algorithm 1: RIS Phase Shift Algorithm.

Input: RIS parameter value   Output: Final configuration of the RIS elements   1:  $\mathrm{Initialize} \mathrm{the} {\theta }_t^n$ = 0   2:  For RIS element: = 1 to N do        // N is elements of RIS   3:      $\mathrm{Compute} {\theta }_t^n$ using Equation (9)  // compute the reflection coefficient   4:    Compute ${\varphi }_t^n$   5:    Update ${\theta }_t^n$   6:  end for