Blood dk macro

[Phanes]

/castsequence reset=0.3 0,0,0,0,Soul Reaper
/castsequence reset=0.3 0,0,0,Rune Strike
/castsequence reset=0.3 0,0,Death Strike
/castsequence reset=0.3 0,Horn of Winter
/castsequence reset=target/alt Icy Touch,Plague Strike,Blood Boil,null
/castsequence reset=5 Heart Strike,Heart Strike,Death Strike,Heart Strike,Heart Strike,Death Strike,Heart Strike,Blood Boil,Death Strike
/cast [combat] Blood Tap
/cast [combat] Bone Shield
/cast [combat] Dancing Rune Weapon
/cast [combat] Empower Rune Weapon
/use [combat] 13
/use [combat] 14
/startattack

Multiblocks is that just one big macro and if so how do you get past the character limit? Or is that several buttons and you just mash them all at once?