Variation on Flashing LED - Problem

This vcode below gice the following error

Blink1_EB.ino: In function 'void loop()':
Blink1_EB.ino:32:8: error: 'val' cannot appear in a constant-expression
Blink1_EB.ino:32:2: error: case label '<expression error>' not within a switch statement
Blink1_EB.ino:32:13: error: expected ':' before '{' token
Blink1_EB.ino:34:4: error: case label '1' not within a switch statement
Blink1_EB.ino:41:4: error: break statement not within loop or switch
Blink1_EB.ino:43:2: error: case label '0' not within a switch statement
Blink1_EB.ino:50:2: error: break statement not within loop or switch
 

/*
  This is not working yet  - EB 4.02.2014
 
  Blink
  The basic Energia example.
 
  Turns on an RED and Green LED when the switch is High and  off if SW2 is LOW, repeatedly.
  Pin 2 has an LED connected on MSP430 boards, has a name 'RED_LED' in the code.
  Pin 14 has an LED connected on MSP430 boards, has a name 'GREEN_LED' in the code.

  Hardware Required:
  * MSP-EXP430G2 LaunchPad
 
  This example code is in the public domain.
*/
 int val=0;
 
// the setup routine runs once when you press reset:
void setup() {               
  // initialize the digital pin as an output.
  pinMode(RED_LED, OUTPUT);
  pinMode(GREEN_LED, OUTPUT); 
  pinMode(P1_3, INPUT);
 
}

// the loop routine runs over and over again forever:
void loop() {
 
   val = digitalRead(P1_3);
 
 case (val) {
 
   case 1 :
  
  digitalWrite(RED_LED, HIGH);   // turn the LED on (HIGH is the voltage level)
 // digitalWrite(GREEN_LED, LOW);
  digitalWrite(GREEN_LED, HIGH);
  delay(100);               // wait for a second
  
   break;
 
 case 0 :
 
  digitalWrite(RED_LED, LOW);    // turn the LED off by making the voltage LOW
 // digitalWrite(GREEN_LED, HIGH);
  digitalWrite(GREEN_LED, LOW);
  delay(100);               // wait for a second
 
 break;
 }
}

I would appreciate advice on what is causing the problem