quantity bar change design

hi all looking to change my quantity bar from a drop down to a just one single button with a plus sign that you can just keep clicking to add instead of a dropdown can anyone help?

Hi there im using palo alto theme and cant find that code you mentioned on my theme code under product.liquid. Possible to add you to let you add the code? thankyou

Is there anyway to get the + inside the button?

And a minus button? So inside the box on the left is a - then the number in the middle and a plus on the right?

Hi there no i didnt get coding yet. need a minus on the left inside the box and a plus on the right inside the box