Finite element programming for multiple load steps

Hello Everybody

I am in need of help in including multiple load step options in my c program which is a fem solver for contact(2D).

I do not understand how  to go for second load step after the 1st one.

Its not clear for me what all i have to do, one thing i know is updating the nodal locations.

Please help me on this or guide to the place where ir can get help.

Thank You