Hello Reid,
the basic idea behind mbed is using an online compiler without installing anything at your home MS Win or OS X Mac or GNU Linux PC.
But you will need an working internet connection, of course. This should not be a big deal at our modern time of communication :-)
Being a fresh mbed starter the best way in doing the very first steps is looking arround in the mbed Handbook and Cookbook section (see toplinks).
There are a lot of simple starter examples available. Just try it and enjoy. You will see that you are going to "love" mbed sooner or later.
best regards
Franz
I am little confusing how to run compiler. I did wrote some program to turn on led 1 to 4. But I could not get led 2 or 3 or 4 working. Most of time I get led1 working. Also when my internet went down. I could not use compiler to run mbed. Is there a way I can run mbed with compiler without internet? Sometime I was on road or cabin and there is no internet. Maybe I am doing wrong with I could not run mbed without internet. I am very new on this. I wish there is more intruction how to use mbed with complier. The last time I use microproccor was 8085. Now I would like to learn how to use mbed.
Reid