You can make a million if you work for 40 years at a salary of $25,000 a year which is pretty easy since that's only $12 an hour. But the IRS is going to take at least 15% of that from you for taxes.
The better question would be, how can I save a million dollars and have it in the bank. In that case you would need to make a lot more than $12 an hour and you would have to put 10% or more of your earnings in a savings account every time you got paid and put it into other investments and not touch it so it would grow even more.
You can make it, but if you spend it all you end up with no money. I suggest you read the book "The Richest Man in Babylon" which is available on Amazon.com for around $6