echo [if {
        echo "if1"
        echo "if1"
     } {
        if {
             echo "if2"
             echo "if2"
        } {
             echo "then2"
             echo "then2"
        } {
             echo "else2"
             echo "else2"
        }
     } { 
        echo "else 1"
        echo "else 1"
     }]