Bayesian Optimization example code

I am trying to find the best combination of multi-dimensional parameters for minimizing output y like

"find x_1,x_2,x_3... to minimize y, f(x_1,x_2,x_3...)=y"

if I already have a few sets of {x's,y}, how do I find the next best guess with Bayesian optimization?

Is there simple example or code that I can try out?