DE1 Board simple digital clock

Hi,

Recently i have purchased DE1 Board. and now Im trying to create simple digital clock using vhdl code. How to create single of pulse per second signal?

how to read keys to increasing/decreasing value of integer?

p.s. I know how to show values to 7 segment display. Im Using Quartus II 11.1 Web Edition (32-Bit). It well be nice if i could use this signal like a component.