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Relay automatically on for some ms before blynk sync occurs

I am using NodeMCU 1.0 for project and blynk app.
When power comes again to the NodeMCU 1.0 it turns on all relay for some milli second before syncing from blynk app. So what I can I do with this program to off the auto relay on pulse.

Here is the program:

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
char auth[] = "xxx";
char ssid[] = "xxx";
char pass[] = "xxx";
void setup()
{
Serial.begin(115200);
Blynk.begin(auth, ssid, pass);
Blynk.syncAll();
}
void loop()
{
Blynk.run();
}
How to implement low or high value to the all usable gpio pin?

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