How did Rabindranath Tagore develop his unique calligraphic style for visual art?

From patterns made out of doodles and crossed-out words

Answer: From patterns made out of doodles and crossed-out words
Wile writing poems, Rabindranath Tagore would often make patterns out of doodles and developed a unique, calligraphic style out of crossed-out words.

Rabindranath Tagore turned to visual art quite late in life. While writing poems, he would often make patterns out of doodles and developed a unique, calligraphic style out of crossed out words. Some of these were turned into human faces and landscapes, which floated captivatingly in his poems. His palette was limited with black, yellow ochre, reds and browns. However, Rabindranath created a small visual world that was a complete departure from the more elegant and delicate style of the Bengal School, which often drew inspiration from Mughal and Pahari miniatures along with Ajanta frescoes.