Run Quartus-II Web Edition and select the "File/New Project Wizard..." menu.
Choose a project directory and name....
and click "Next".
Do not add files here...
just click "Next".
Now is the time to choose the FPGA device used by your FPGA board.
No need to go further, click "Finish".
Select the "File/New" menu and choose "Verilog HDL File"...
then type the following text (as-is, this is case sensitive)
and save under the name "ledblink.v".
Click on the "Start Analysis & Synthesis" menu.
No error should be reported.
Click on the "Assignments/Pin Planner" menu and at the bottom of the "Pin Planner" window, enter the location for the two pins "LED" and "clk".
Close the "Pin Planner" window.
Click on the "Assignments/Device" menu and then on "Device and Pin Options"...
and select "As Input tri-stated with weak pull-up" for the unused pins.
Click on the "Processing/Start Compilation" menu.
The design is ready to be downloaded into the FPGA.
Go to Altera's Introduction to the Quartus II Software page.