Need help with punnett squares please!!!!!!?

Many animals and plants bear recessive alleles for albinism, a condition in which zygous individuals completely lack pigments. An albino plant, for example, lacks chlorophyll and is white. An albino person lacks any melanin pigment. If two normally pigmented person, heterozygous for the same albinism allele marry, what proportion or their children would you expect to be albino? Use a punnett square please