gistfile1.sh

#!/bin/sh                                                                         
                                                                                  
if [[ `date +"%H"` -lt '8' ]];                                                    
then                                                                              
        x=$(($RANDOM % 1000))                                                     
        y=$(($RANDOM % 1000))                                                     
        exp=$(($x + $y))                                                          
        echo "Enter the sum of $x + $y: "                                         
        read -e in                                                                
        if [[ "$exp" -ne "$in" ]]; then                                           
                echo "You might be drunk, $x + $y = $exp, not $in"                
                exit -1                                                           
        fi                                                                        
fi                                                                                
exec "$@"