What's the correct notation for adding notes one finger at a time until the whole chord is played? On each eighth note, the next note is played by a new finger, but all the previous notes are held. So beat 1 play an A, on the 'and' add the E, then the C# and so on until all the notes of the chord are ringing out simultaneously?

So in this example, the left hand plays the three bass clef notes and sustains all three to the end of the bar, but the right hand plays the treble clef as individual notes, lifting the finger from the previous note before playing the next.

Piano Sheet Music example