Major scale and Minor scale

The composition of the major scale is one-one-half-one-one-one-half.
Example: E -> F # or Gb - G # or Ab - A - B - C # or Db - D # or Eb - E '. The composition is referred to as E-Major or (E)

The composition of the minor scale is one-half-one-one-half-one-one.
Example: E -> F # or Gb - G - A - B - C - D  - E '. The composition is referred to as E-Minor or (Em)

Both scales is important to remember, because it will be useful to play a lot of melody in the song.
Each person has a different level of creativity in playing the melody on the basis of both these scales. And indeed they are expected to be like that (CREATIVE).