Formula to pick value from 1 cell and fill in other cells upto the value in first cell

Hi Guys


Am trying to find a formulae whereby in the attached spread sheet I have say client 1 in Column B who enrols on a program for 12 months (hard code number in cell c4) and starts in Month 1 (Hard Code in Cell d4) then in cell e 4 the number 1 appears upto the next 12 months. Similarly if the client 2 starts a program for 6 months but starts in month 2 than in cell F5 the number 1 appears and continues for 6 months. The formula should be flexible such that if I change the number in say cell c5 from 6 to 5 and change the month from say Month 2 to Month 3 than the resulting numbers in column e to R change accordingly


Please see attached spreadsheet as an example of what I am looking for.


Thanks for your help in advance.