life.sh

#!/bin/bash

GENS=50

WIDTH=12
HEIGHT=12
declare -a OLD
declare -a NEW

OLD=( \
 0 0 1 0 0 0 0 0 0 0 0 0 \
 1 0 1 0 0 0 0 0 0 0 0 0 \
 0 1 1 0 0 0 0 0 0 0 0 0 \
 0 0 0 0 0 0 0 0 0 0 0 0 \
 0 0 0 0 0 0 0 0 0 0 0 0 \
 0 0 0 0 0 0 0 0 0 0 0 0 \
 0 0 0 0 0 0 0 0 0 0 0 0 \
 0 0 0 0 0 0 0 0 0 0 0 0 \
 0 0 0 0 0 0 0 0 0 0 0 0 \
 0 0 0 0 0 0 0 0 0 1 1 0 \
 0 0 0 0 0 0 0 0 0 1 0 1 \
 0 0 0 0 0 0 0 0 0 1 0 0 \
)


GENCOUNT=0
while (( GENCOUNT < GENS ))
do

#evolve
  COUNT=0
  while (( COUNT < ( WIDTH * HEIGHT ) )) 
  do
    NBR=0
    (( X = COUNT % WIDTH ))
    (( Y = COUNT / WIDTH ))
    if (( X > 0 ))
    then 
      if (( Y > 0 )) && [ ${OLD[ COUNT - 1 - WIDTH ]} -eq 1 ]
      then (( NBR++ ))
      fi 
      if [ ${OLD[ COUNT - 1 ]} -eq 1  ]
      then (( NBR++ ))
      fi
      if (( Y < HEIGHT - 1 )) && [ ${OLD[ COUNT - 1 + WIDTH ]} -eq 1 ]
      then (( NBR++ ))
      fi
    fi
    if (( X < WIDTH - 1 ))
    then
      if (( Y > 0 )) && [ ${OLD[ COUNT + 1 - WIDTH ]} -eq 1 ]
      then (( NBR++ ))
      fi
      if [ ${OLD[ COUNT + 1 ]} -eq 1 ]
      then (( NBR++ ))
      fi
      if (( Y < HEIGHT - 1 )) && [ ${OLD[ COUNT + 1 + WIDTH ]} -eq 1 ]
      then (( NBR++ ))
      fi
    fi
    if (( Y > 0 )) && [ ${OLD[ COUNT - WIDTH]} -eq 1 ]
    then (( NBR++ ))
    fi
    if (( Y < HEIGHT - 1 )) && [ ${OLD[ COUNT + WIDTH]} -eq 1 ]
    then (( NBR++ ))
    fi
  

    if [ $NBR = 3 ] || ([ $NBR = 2 ] && [ ${OLD[COUNT]} = 1 ])
    then NEW[COUNT]=1
    else NEW[COUNT]=0
    fi
  
  
    (( COUNT++ ))
  done
    #echo "${OLD[@]}"
    #echo "${NEW[@]}"
    OLD=""
    OLD=( "${NEW[@]}" )
    #echo ""
    #sleep 1
  
#print
  clear
  COUNT=0
  while (( COUNT < (WIDTH * HEIGHT) ))
  do
      echo -e -n \
      "$( echo -n "${NEW[COUNT]} " | \
      sed \
      -e 's/1 /\\e[41m  \\e[m/' \
      -e 's/0 /\\e[46m  \\e[m/')"
    if !(( (COUNT + 1) % WIDTH   )) 
      then echo  ""
    fi
      (( COUNT++ ))
  done
    #echo  ""
    #echo "${NEW[@]}"

  sleep 1


  (( GENCOUNT++ ))

done