What are all the numbers for on the US Dollar?

FRONT QUESTIONS





What are the green numbers/letters for?





What are the tiny three digit letter and numbers for?





What are the one or two digit black numbers for?





BACK QUESTIONS





What is the tiny one digit number for?





OTHER QUESTIONS





I have heard that there is an eagle on the US dollar, but where is it?





I've also heard there are spiderwebs, but where?





Are there any other interesting things on the US Dollar?





OTHER NOTES





I'm talking about the United States of America $1.00 Dollar. Thanks in advance for whoever helps!What are all the numbers for on the US Dollar?
I believe the below website will provide you the info you are looking for.