Set the tempo between 130 and 160 beats per minute. Insert a steady bass beat on every downbeat and a hi-hat on every upbeat.
Loop the bass and hi-hat for 8 beats. As the beat is being looped, think of a melody to go over it. This is your introduction.
Create an arpeggio and a chord progression with a keyboard or on a beat-making program like Fruity Loops or Cubase. As the beat and the chord progressions are being looped, superimpose progressions--which are similar but an octave higher or lower--on top of it.
Fade out the first arpeggio and fade in new ones that are slightly different. Add effects such as delay, chorus and phaser to these arpeggios. This is your buildup.
Fade out all previous arpeggios and chord progressions, and stop the bass and hi-hat. Gradually fade in some arpeggios that are much softer and slower. This is your breakdown, the section that slows the song down and adds tension. Make the breakdown 32 beats. Then bring back the bass and hi-hat.
Fade out the soft breakdown arpeggios, and fade in aggressive, fast arpeggios. Superimpose 10-15 arpeggios that are similar but with different octaves and effects. The moment the song builds up to the climax, drop the bass and hi-hat for four beats. Bring back the bass and hi-hat. Fade in the fast arpeggios at maximum volume.
Loop the climax for as long as you wish. Fade out the arpeggios and resolve the climax by inserting slower arpeggios and chord progressions.