While this is thread seems strongly pointed towards Python (which is a great language to learn and what you asked for), I want to point you to JavaScript.
There's this excellent book called Eloquent JavaScript, which I really love. And it's free to read: eloquentjavascript.net
Although I've read this after beeing able to program, I think this is a great resource to learn programming. The book leaves out DOM-Manipulation (the ugly stuff) till later chapters, so you can understand the language basics.
JavaScript might not be the best language, but it's mighty popular and all you need to play with it is a browser. Plus the examples from the book are interactive, so you can run and understand them quickly.
The language is simple, so you'll get going quickly.
It might be troublesome if you don't know any HTML or CSS, but these things are not that hard to grasp after all.