int höhe1=7;
int blank1=1;
int sternlinks= 1;

void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
for (int blank1=1; blank1<=zeile1; blank1++){
  Serial.print(" ");
}
for (int sternlinks = höhe1; sternlinks y=zeile1; sternlinks --){
Serial.print(("*"));
}
for (int sternrechts =höhe1-1; sternrechts >=zeile1;sternrechts--){
  Serial.print(("*"));
}
Serial.println();
}