Each "note" of Solresol is represented as a symbol, for example, "Do" is a circle, "Re" is a vertical line, "Mi" and "La" are both half-circles, the former facing downwards, the latter facing right, "Fa" is a diagonal line from left-top to right-bottom, "Sol" is a horizontal line, and "Si or Ti" is a diagonal line from left-bottom to right-top.
"Do Re Mi" from The Sound of Music is a wonderful song for learning the solfège syllables. You may know the lyrics: Do - a deer, a female deer. Re - a drop of golden sun. Mi - a name I call myself. Fa - a long, long way to run. Sol - a needly pulling thread. La - a note to follow sol. Ti - a drink with jam and bread