How to get the ON voltage equal to 1V for two non overlapping pulses using Arduino for my charge pump

[aroosababar11]

#include <Wire.h>

 void setup() {
pinMode(3, OUTPUT);
pinMode(6, OUTPUT);
Serial.begin(9600);
}

 void loop() {
digitalWrite(3, HIGH);
digitalWrite(6, LOW);
delay(1);
digitalWrite(6, HIGH);
digitalWrite(3, LOW);
delay(1);
}