coding

respected sir/mam i want to simulate a graph with xaxis values are divided into subslots of duration 50sec upto 400sec equally time index n i need to plot the value of payoff formula in y axis and at 150 subslot i need to deviate from a desired condition by varying tho value at 150 slot i need to pushed to punishement stage in which my signal strength greatly decreases below my desired value and this duration lasts for 151 to 300 slot and after that i need to MAKE UP MY ORIGINAL SIGNAL STRENGTH,THANKS IN ADVANCE