SQL & PL/SQL :: Rows To Columns With Headings

I have a table with the following structure and data.

create table testing_1 (column_1 varchar2(10),
heading_1 number ,
value_1 number);
insert into testing_1 (COLUMN_1, HEADING_1, VALUE_1)
values ('First', 10, 99);
[code].......

COLUMN_1 HEADING_1 VALUE_1
First 10 99
Second 50 50
Third 10 80
First 50 77
Third 50 70
First 100 55
Third 100 60

And i need the output like below. (i.e. distinct heading_1 (10, 50, 100) will become our new column headings and corresponding values for these headings will be filled in all the rows)

10 50 100
First 99
Second 50
Third 80
First 77
Third 70
First 55
Third 60