VHDL with ModelSim and Quartus II

Since it is my first use, ask the administrator to move the topic if you 
are in the wrong place.
I need help to represent the figure in VHDL to simulate in ModelSim or 
in Quartus II.
It will only be simulated to present a thesis of the postgraduate 
course.
The project will not be physically implemented.
I do not know anything VDHL, so ask for help.
A1, B1, C1, C2, C3, D1, E1, F1 and G1 are input.
RED, GREEN, YELLOW and PURPLE are LEDs.