I need the parametric equations for a simple pendulum.

This is for a personal engineering project. I need the parametric equations y(t) and x(t) for a very simple pendulum. Assume no friction, no forcing, no variation in gravity, a point mass, and the tether angle is significantly less than 30 degrees. It has been a while since I did differential equations, so please link me to some algebraic parametric solutions to this most simple pendulum.

Thank you.