Resizing code blocks for mobile

I have a code on my website that is pulling a page from another website and showing it on my site. However, it is not optimized for mobile and, when I view it on a phone, the window runs off the screen. Does anyone have a suggestion for how to fix this? Here is the code I have currently: 

<iframe
  id="AIM"
  title="AIM"
  width="900"
  height="750"
  src="https://nti.connected.info/profiles/64e77a08b4b3b922510f7189">
</iframe>

Never mind-I was able to fix it by finding a different code to use.