Compute the neutral Pion Correlator for already computed configurations (configurations are too large to put here, you have to create your own to use this code. I used configurations computed via the tmLQCD-code, <github.com/etmc/tmLQCD>).
The computation is done in two steps:
Using e.g. 4 stochastic sources
./run_dis.x p 4
The result, the propagator, is saved in output/propagator/. The used stochastic sources are stored in output/source/.
./run_dis.x c 4
The correlator is saved in output/correlator/.