Gunner
2
Hello… in answer to your titled question… First you read the prerequisite Welcome Topic…
Then go back and edit your first post to properly format your posted code…
Next, read the Help Files for proper ways to code with Blynk (hint, your current void loop() is bad for Blynk)…
http://help.blynk.cc/getting-started-library-auth-token-code-examples/blynk-basics/keep-your-void-loop-clean
http://help.blynk.cc/getting-started-library-auth-token-code-examples/blynk-basics/how-to-control-anything-with-blynk-app
http://help.blynk.cc/getting-started-library-auth-token-code-examples/blynk-basics/how-to-display-any-sensor-data-in-blynk-app
Then search this forum for keywords like ultrasonic… (hint I have a topic full of examples, including one for ultrasonic)…
https://community.blynk.cc/search?q=ultrasonic%20sensor
And finally, read those articles, try out the examples and have fun learning 
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