Create an HTML that:

1. When the user clicks the button: the div shows "Clicked, textbox text is xxx" in bold, where xxx is the current content of the textbox

2. When the user modifies parameter "x" in dat.GUI, display "x has changed. x=yyy", where yyy is equal to the numerical value of x

3. When the user types Enter in the textbox: convert the text of the textbox into a number, add 100, update the parameter "y" in dat.GUI with that value