Defining boundary condition and initial condition for PDE.

I want to solve following 1D Burger's equation using pdepe. With the initial and boundary condition of 4. Unfortunately, I couldn't figure out how to define initial and boundary condition based on "Source" and "Flux" term explained in pdepe document help. x and t grid are as follows. v=0.2. x = linspace(0,2*pi,81); t = linspace(0,pi/8,20);