Look at the errors that you get; scroll through the output window
C:\Users\sterretje\AppData\Local\Temp\arduino_modified_sketch_763798\sketch_oct16a.ino: In function 'void loop()':
sketch_oct16a:102: error: 'brake' was not declared in this scope
brake();
^~~~~
sketch_oct16a:105: error: 'pumpstart' was not declared in this scope
pumpstart();
^~~~~~~~~
C:\Users\sterretje\AppData\Local\Temp\arduino_modified_sketch_763798\sketch_oct16a.ino:105:7: note: suggested alternative: 'va_start'
pumpstart();
^~~~~~~~~
va_start
sketch_oct16a:106: error: 'aim' was not declared in this scope
aim();
^~~
sketch_oct16a:108: error: 'pumpstop' was not declared in this scope
pumpstop();
^~~~~~~~
C:\Users\sterretje\AppData\Local\Temp\arduino_modified_sketch_763798\sketch_oct16a.ino:108:7: note: suggested alternative: 'pump'
pumpstop();
^~~~~~~~
pump
sketch_oct16a:112: error: 'leftUltra' was not declared in this scope
leftUltra();
^~~~~~~~~
sketch_oct16a:116: error: 'rightUltra' was not declared in this scope
rightUltra();
^~~~~~~~~~
sketch_oct16a:120: error: 'forward' was not declared in this scope
forward();
^~~~~~~
C:\Users\sterretje\AppData\Local\Temp\arduino_modified_sketch_763798\sketch_oct16a.ino:120:9: note: suggested alternative: 'fread'
forward();
^~~~~~~
fread
sketch_oct16a:128: error: 'brake' was not declared in this scope
brake();
^~~~~
sketch_oct16a:129: error: 'right' was not declared in this scope
right();
^~~~~
C:\Users\sterretje\AppData\Local\Temp\arduino_modified_sketch_763798\sketch_oct16a.ino:129:5: note: suggested alternative: 'Fdright'
right();
^~~~~
Fdright
Using library Servo at version 1.1.2 in folder: C:\Program Files (x86)\Arduino\libraries\Servo
exit status 1
'brake' was not declared in this scope