//words preceded by "//"" are comments and are not executed
bool ticktock; //declare ticktock as a boolean flag

void setup() {          //runs once on start up
Serial.begin (115200); //open the serial port for USB cable
}

void loop() {         //runs in circles!
ticktock = !ticktock; //every pass through reverse the flag
  if (ticktock) {     //test current value of the ticktock flag
    Serial.println("tick");  
  } else {             //prints one or the other to the USB port
    Serial.println("tock");
  }
delay (1000);           //wait for a second and run again!
}

I am using:
-(MacOS, M1)
-Arduino IDE 2.2.1 , but 1.8.19 is fine but you must update all libraries
-ESP 2.0.11 (Board definition)
-I used Github to down load (clone) the complete set of files.
You really should copy all of the files (from the downloaded repository) folder marked Lib into your 'libraries' folder, overwriting and replacing the originals, but don't do a Arduino library update after that! LilyGO boards are very fussy about using THEIR versions of some standard libraries, not good form, tho'.
-All my libraries are current, except the aforementioned LilyGO supplied set.

-and the comm setup is:

"ESP32S3 Dev Module"
Upload Speed: "921600"
USB Mode: "Hardware CDC and JAG"
USB CDC On Boot: "Enabled"
USB Firmware MSC On Boot: "Disabled"
USB DFU On Boot: "Disabled"
Upload Mode: "UARTO / Hardware CDC"
CPU Frequency: "240MHz (WiFi)"
Flash Mode: "QIO 80MHz"
Flash Size: "16MB (128Mb)"
Partition Scheme: "Default 4MB with spiffs (1.2MB APP/1.5MB SPIFFS)"
Core Debug Level: "F' PSRAM: "OPI PSRAM"
Arduino Runs On: "Core 1"
Events Run On: "Core 1"

Hope that helps -Terry