▁ 3 , ▁ 2 , ▁ 2 , ▁ 3 . ▁The ▁proportion ▁ 3 , ▁ 3 , ▁ 2 , ▁ 2 ▁is ▁used ▁similarly ▁in ▁the ▁second ▁solo ▁for ▁prepared ▁piano . ▁ ▁Four ▁D ances ▁Com posed ▁in ▁ 1 9 4 3 – 4 4 ▁for ▁a ▁ch ore ography ▁by ▁H anya ▁Hol m . ▁Original ▁title ▁What ▁So ▁Pr oud ly ▁We ▁H ail , ▁also ▁known ▁as ▁Su ite ▁of ▁four ▁d ances . ▁The ▁four ▁d ances ▁are : ▁ ▁Dance ▁No . ▁ 1 ▁for ▁per cussion ▁and ▁piano ▁ ▁Dance ▁No . ▁ 2 ▁for ▁ten or ▁solo ist ▁( word less ) ▁and ▁piano ▁ ▁Dance ▁No . ▁ 3 ▁for ▁piano ▁ ▁Dance ▁No . ▁ 4 ▁for ▁ten or ▁solo ist ▁( word less ), ▁per cussion ▁and ▁piano ▁ ▁Con cer to ▁for ▁P rep ared ▁P iano ▁Com posed ▁in ▁ 1 9 5 0 – 5 1 . ▁The ▁work ▁is ▁scored ▁for ▁a ▁prepared ▁piano ▁and ▁a ▁chamber ▁or chestra ▁and ▁was ▁written ▁using ▁the ▁gam ut ▁technique ▁C age ▁developed ▁in ▁String ▁Quart et ▁in ▁Four ▁Part s ▁( 1 9 5 0 ). ▁Independ ently ▁created ▁son or ities ▁( single ▁notes , ▁ch ords , ▁aggreg ates ) ▁are ▁arranged ▁into ▁rect angular ▁charts ; ▁the ▁music ▁is ▁composed ▁by ▁trac ing ▁geometric ▁patterns ▁on ▁them . ▁There ▁are ▁three ▁movements . ▁The ▁piano ▁part ▁develop s ▁from ▁free ▁composition ▁(