THE TEN SECOND INTRODUCTION
Take an IF statement, you have three things you need to know: a calculation which can result in True or False, a positive outcome and a negative outcome. So create a class with three elements to represent this.
A LOOP statement is similar, you need an expression, a positive outcome and a command to call when the loop is done.
By creating a classes and objects for concepts like commands and expressions you can quickly and intuitively build a useful and functional programming language.