The program does not even verify and i recieve message like this:
arduino-builder/arduino-builder -compile -core-api-version 10611 -build-path /tmp/219822155/build -hardware arduino-builder/hardware -hardware arduino-builder/packages/cores -tools arduino-builder/tools -tools arduino-builder/packages/tools -built-in-libraries arduino-builder/latest -libraries /tmp/219822155/pinned -libraries /tmp/219822155/custom -fqbn arduino:avr:uno -build-cache /tmp -logger humantags -verbose=false -logger humantags /tmp/219822155/Morse_Code_Challenge
/tmp/ccO5MQPZ.ltrans0.ltrans.o: In function main': /home/admin/builder/arduino-builder/packages/cores/arduino/avr/cores/arduino/main.cpp:46: undefined reference to loop'
collect2: error: ld returned 1 exit status
exit status 1