test robot wont upload on my arudino nano i get this.
./opt/arduino-builder/arduino-builder -compile -core-api-version 10611 -hardware opt/arduino-builder/hardware -hardware ./opt/cores -tools opt/arduino-builder/tools -tools ./opt/tools -built-in-libraries opt/libraries/latest -logger humantags -fqbn arduino:avr:nano:cpu=atmega168 -build-cache /tmp -build-path /tmp/249002364/build -verbose -prefs runtime.tools.avr-gcc.path=./opt/tools/avr-gcc/5.4.0-atmel3.6.1-arduino2 -prefs runtime.tools.avrdude.path=./opt/tools/avrdude/6.3.0-arduino14 -prefs runtime.tools.arduinoOTA.path=./opt/tools/arduinoOTA/1.2.1 -libraries /tmp/249002364/custom -libraries /tmp/249002364/pinned /tmp/249002364/Test_robot
Multiple libraries were found for "Servo.h"
Used: /home/ubuntu/opt/libraries/latest/servo_1_1_3
Not used: /home/ubuntu/opt/libraries/latest/rokitsmart_1_0_9
Not used: /home/ubuntu/opt/libraries/latest/printoo_library_1_0_2
Not used: /home/ubuntu/opt/libraries/latest/evive_2_0_1
Multiple libraries were found for "NewPing.h"
Used: /home/ubuntu/opt/libraries/latest/newping_1_9_1
Not used: /home/ubuntu/opt/libraries/latest/nanoplayboard_0_1_1
Using library servo_1_1_3 at version 1.1.3 in folder: /home/ubuntu/opt/libraries/latest/servo_1_1_3
Using library newping_1_9_1 at version 1.9.1 in folder: /home/ubuntu/opt/libraries/latest/newping_1_9_1
/tmp/249002364/Test_robot/Test_robot.ino:21:9: error: expected constructor, destructor, or type conversion before ';' token
setup()
^
/tmp/249002364/Test_robot/Test_robot.ino: In function 'int setup()':
/tmp/249002364/Test_robot/Test_robot.ino:21:8: error: ambiguating new declaration of 'int setup()'
setup()
^
In file included from /tmp/249002364/build/sketch/Test_robot.ino.cpp:1:0:
/home/ubuntu/opt/cores/arduino/avr/cores/arduino/Arduino.h:153:6: note: old declaration 'void setup()'
void setup(void);
^
exit status 1
what can i do?