So. This is one way of doing it.
Click to advance the text.
What I have there is a constant that has all text sequence separated by "|" and a variable (currentText) that controls which is the current text from that list. I have a function that creates a textbox and sets its completeText variable to the currentText from the constant. Every time I click, it increases the currentText by 1 and creates another textbox. Also, textboxes have a timer behavior that is started on creation.
EDIT: There's also a condition to avoid clicking while the text is being typed. And you can change typing speed by changing the corresponding textbox variable.
Any questions, just let me know.