"Do not use multiple lines, stick to one continuous line."
"Avoid using colors; maintain the image in black and white."
"Do not add any detailed features like eyelashes or lips, keep it abstract."
"Avoid making the face too realistic; it should be abstract yet recognizable as a girl's face."
"Do not lift the pen off the canvas once you start drawing."
"Avoid adding any background details or extra elements outside of the face."