https://africa.si.edu/exhibits/inscribing/nsibidi.html  

https://guardian.ng/life/a-look-at-nsibidi-the-long-lost-african-writing/

Nsibidi is an ancient written langauge, it's earliest evidence going back to 400 CE. It was developed by "the Ejagham peoples of southeastern Nigeria and southwestern Cameroon in the Cross River region. It is also used by neighboring Ibibio, Efik and Igbo peoples" (Africa.si.edu). It was used to decorate skin, houses, sculpture, and clothing. It was used as the written alphabet for Igbo, before being replaced by the Isuama Igbo Alphabet, then the Onwu alphabets. It has largely gone out of use in Africa, but interestingly can still be found in the Caribbean, particularly in Cuba, Jamaica, and Haiti.