Go to Account Settings Edit Appearance Edit Theme.
Click on the Edit HTML link underneath Custom Theme.
Paste POWr Script
Paste this exact POWr script into your HTML file, in between the Head tags. Then update and save.
Create New Text Post
Go back to the Tumblr dashboard and add a new Text post.
Paste the Shortcode
Paste the shortcode into the post. Then save. You'll see the new POWr Pinterest Feed plugin when you expand the post. Click on the Settings Icon to open the POWr Editor.
Begin editing the following Pinterest Feed Plugin right in the Tumblr website:
Go to the live Tumblr website and select the Settings Icon in the upper right corner of the Pinterest Feed Plugin.