How do i embed iTunes iframe to my website

How do i embed iTunes iframe to my wordpress website. Been trying to add the banner code after i was approved as an affiliate.
I used the text widget and tried adding it to html area of my post but each time all i see is a blank area.
It never displays just automatically disappears.
What can i do to resolve this thank u

from HTML & Website Design http://ift.tt/25zpCIq
via IFTTT
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