pred(t) = pred(t - dt) + (pred_birth - pred_death) * dt

INIT pred = 1



INFLOWS:

pred_birth = pred*prey*pred_birth_rate

OUTFLOWS:

pred_death = pred*pred_death_rate

prey(t) = prey(t - dt) + (prey_birth - prey_death) * dt

INIT prey = 10



INFLOWS:

prey_birth = prey*prey_birth_rate

OUTFLOWS:

prey_death = pred*prey*prey_death_rate

pred_birth_rate = 0.05

pred_death_rate = 0.5

prey_birth_rate = 0.5

prey_death_rate = 0.5