To illustrate the technique of blasting, consider the following IBVP
Take 
at all grid points and take c = 1 at all grid points
except the middle point where
c is ``blasted'' (
, for example).
With 51 interior grid points use the explicit, forward
in time, method (with no IF statements) to approximate the solution to this
problem.
Use xmgr to plot your solution at early, intermediate, and late times.
