Write assymbly language code MASM of the following code

Question

if(( val1 >= val2 ) and (val2 < val3))
{
while( val1 < 20 )
{   
  val1 = val1 + 1
  val3 = val3 * (val1 – val2) mod 20
}
}
else if( val1 < val2 )    {
v