IM NEW TO KEIL-HAVING PROBLEM WITH - NEED STEPS TO SOLVE THIS ERROR

Build target 'Target_1'
"ARMM.s", line 1 (column 6): Error: A1163E: Unknown opcode tpl, , expecting opcode or Macro
    1 00000000 AREA tpl, CODE, READONLY
                    ^
"ARMM.s", line 2 (column 8): Error: A1163E: Unknown opcode __main , expecting opcode or Macro
    2 00000000 EXPORT __main
                      ^
"ARMM.s", line 4: Fatal error: A1355U: A Label was found which was in no AREA
    4 00000000 __main
3 Errors, 0 Warnings
armclang: error: armasm command failed with exit code 8 (use -v to see invocation)
assembling ARMM.s...
".\Objects\ARM.axf" - 1 Error(s), 0 Warning(s).


MY CODE AREA tpl, CODE, READONLY
EXPORT __main

__main
 MOV r1, #0x1234 
 LDR r1, =0x20000000 
 LDR r0, =0x80000000 
 LDR r2, =0xaaaaaaaa 
 STR r0, [r1] ;
END

FOLLOWED FROM YOUTUBE STILL GOT AN ERROR