Amatafula Angonakalisayo Idizayini kaPatrick Sarran ifana nefomula edumile eyenziwe nguLouis Sullivan ”IFomu lilandela umsebenzi”. Kulomoya, amatafula we-ILOK aqokelwe ukubeka phambili ukukhanya, amandla kanye nokulinganisa. Lokhu kwenziwe ngenxa yokubonga ngezinto ezihlanganiswe ngokhuni eziqongweni zetafula, iJiyomethri eyingqayizivele yemilenze namabakaki ahlelekile ngaphakathi kwenhliziyo ehlanganisiwe yezinyosi. Ngokusebenzisa umugqa we-oblique wesisekelo, isikhala esisebenzayo siyatholakala ngezansi. Ekugcineni, kusukela ugodo kuqhamuka ubuhle obufudumele obuthuthukiswa kakhulu ngabadli abahle.