According to how-to-draw-and-paint, one draws a rose by visually breaking it into parts consisting of basic shapes like circles, triangles, squares and rectangles. To draw a rose, begin by sketching the overall shape of the rose, such as a circle or oval, and then add details to it such as petals and leaves by sketching their basic shapes.
Drawing complex items is simplified by using basic shapes. Quickly sketching a circle to represent the general shape of a rose gives the artist an idea of how much space on the paper the rose drawing will use as well as a starting point for adding detail. Knowing and defining the size of the drawing at the beginning allows artists to avoid running out of room before the drawing is finished. How-to-draw-and-paint states that quickly sketching the basic shapes of different parts of a drawing allows the artist to avoid second guessing and striving for perfection. This allows the brain to instinctively pick out the important lines of the image.
Drawing and illustration tutorials are resources that provide step by step instructions for drawing. To draw by following a tutorial, use similar materials to the ones recommended or shown in the instructions and attempt to mimic each step in the suggested order.