Write multiple line assembly in Arduino

multi-asm.ino

// single line example
#define ASM(x) asm volatile(x "\n\t")
void setup() {
  ASM("ldi  r16, 0b00001000");
  ASM("out  0x17, r16");
  ASM("ldi  r19, 1");
  ASM("ldi  r20, 1");
  task();
}

// multi line example
void task() {
asm volatile(R"(
task1:  
  ldi r16, 0b00001000 
  out 0x18, r16 
  rcall delay0  
  ldi r16, 0b00000000 
  out 0x18, r16 
  rcall delay0  
  rjmp task1  

delay0: 
  ldi r17, 0  

delay1: 
  ldi r18, 0  
delay2: 
  dec r18 
  brne delay2 
  dec r17 
  brne delay1 
  ret 
)");
}

void loop() {
}

asm volatile(R"(
// You can write here!
)");