Simplify the following text for a Grade 12 native English-speaking person.
Original: Kolkoutine settled into his current characteristic style by the end of the 1980 â s in which he mixes traditions from the Russian icons with other art styles : suprematism from Malevich , cubism and naÃ ve art .
Simplified: Kolkoutine settled into his current characteristic style by the end of the 1980 â s in which he mixes traditions from the Russian icons with suprematism from Malevich , cubism and naÃ ve art .