Moving values from one text box to another.

I've got a userform that will have 6 text boxes on it that show up one at a time when a value in the previous one gets a value.

I want to make it so that if for example TextBox1, TextBox2, and TextBox3 currently have a value and TextBox4 is visible with no value. If the value in TextBox2 is deleted it will move the value of TextBox3 to TextBox2 and make TextBox4 not visible. Leaving TextBox3 visible with no value.

It would do the same thing no matter how many of the textboxes had a value and one was deleted, always leaving 1 empty textbox

I've tried searching the forms for something that would work but haven't had any luck.