Creating an Opmode

Create a Java file with the following content in the usual TeamCode/src/main/java/org/firstinspires/ftc/teamcode directory with the following template content:

package org.firstinspires.ftc.teamcode;
import com.github.mmm.easyop.Linear;
import com.github.mmm.easyop.Inject;
import com.github.mmm.easyop.Device;
import com.qualcomm.robotcore.eventloop.opmode.TeleOp;
import com.qualcomm.robotcore.eventloop.opmode.Autonomous;
@Autonomous(name = "OpModeName")
// or
@TeleOp(name = "OpModeName")
public class OpModeName extends Linear {
    public void opInit() {
      // This code runs when you select 'Init' in the Driver Station.
    }
    public void opBeforeLoop() {
      // This runs once when you hit 'Run'.
    }
    public void opLoop() {
      // This runs over and over again after opBeforeLoop until you stop the opmode.
    }
    public void opAfterLoop() {
      // This runs once when you stop the opmode. Put cleanup code here.
    }
}

And customize to your liking. Remember to pick one of either @Autonomous or @TeleOp!