Terminal to Graph

Might be easier to do so with the (currently undocumented) Segmented Switch…

EDIT - Fixed, tested and and reposted this example:

BLYNK_WRITE(V18) {  // Segmented Switch set to 3 buttons
  switch (param.asInt())  {
    case 1:  // Full Sun
      Blynk.virtualWrite(V19, "Full Sun");
      break;
    case 2:  // Partial sun & cloud
      Blynk.virtualWrite(V19, "Sun & Cloud");
      break;
    case 3:  // Overcast
      Blynk.virtualWrite(V19, "Overcast");
      break;
  }
}

You will need to reevaluate your coding methods when using an IoT based system like Blynk…

http://help.blynk.cc/getting-started-library-auth-token-code-examples/blynk-basics/keep-your-void-loop-clean