As a cell progress into its life cycle and exits interphase, it enters mitosis and will completely divide into two genetically identical daughter cells. Mitosis is organized into 4 stages known as prophase, metaphase, anaphase, and telophase, with an addition final process known as cytokinesis.  In the early stages of prophase, the chromosomes within the cell begin to condense, the mitotic spindle begins to form, and the nucleolus disappears. Later on, during prophase, sometimes known as prometaphase, the chromosomes fully compact, the nuclear envelope breaks down releasing the chromosomes, and the mitotic spindle continues to grow while some microtubules begin to latch onto chromosomes. The cell progresses into metaphase, where the microtubules finish latching onto all the of chromosomes and aligning them at the center of the cell in preparation of anaphase. During anaphase, the chromosomes are pulled to opposite sides of the cell by microtubules, forming new chromosomes.  When the cell enters telophase, the mitotic spindle is broken down and two nuclei form with the new chromosomes, which are beginning to return into their original uncompacted form. Although the cell has now almost completely divided, two daughter cells will not be formed until cytokinesis occurs. Cytokinesis may begin during anaphase or telophase depending on the cell, the cell is pinched between the two nuclei and the cytoplasm is divided into two new daughter cells. Now that two daughter cells have been formed, mitosis is complete and the cells will continue on into next stage in the cell life cycle.

References:

https://www.khanacademy.org/science/biology/cellular-molecular-biology/mitosis/a/phases-of-mitosis